maternal obesity is more important for long term outcome ...dtogi.ir/mckupload/file/4_prof...
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University Medical Center, Utrecht, the NL
Gerard H.A.Visser
Chair FIGO Committee Safe Motherhood & Newborn Health
Maternal obesity is more
important for long term
outcome of children than
diabetes
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Diabetes and Pregnancy
Cong malf PN death Macrosomia Mat death
GDM ? ? ? ?
Type- 2 ? ? ? ?
Type -1 ? ? ? ?
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Diabetes and Pregnancy
Cong malf PN death Macrosomia Mat death
GDM - +/- + -
Type- 2 ++ +++ ++ -
Type -1 ++ ++ +++ +
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Infant weight at age 14………….
Cong malf PN death Macrosomia Mat death
GDM - +/- + - ?
Type- 2 ++ +++ ++ - ?
Type -1 ++ ++ +++ + ?
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Obesity and GDM
BMI Odds ratio GDM
20-25 1 10%
25-30 1.6-1.7
>30 3.6-4 35%
>40 10 100%
Sebire et al, 2001; Baeten et al, 2001, Kumari, 2007
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Obesity without diabetes
Body Mass index <25 25-30 >30
PIH 1 1.7 5.6
Birth weight>p90 1 1.1 2.5
CS 1 1.6 2.7
Induction of labour 1 1.5 3.2
Jensen et al, 2003. 2459 ‘glucose tolerant’women
Correction for 2 h glucose level, age, parity,
ethnicity, smoking, gest weight gain, gest age at
delivery
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Weight gain during pregnancy in obese
glucose tolerant women (BMI>30 ; multivariate analysis)
< 5kg 5-10 10-15 >15
Hypertension 1 2.1 3.6 4.8
CS 1 2.4 3.0 3.6
Ind.labour 1 2.7 2.8 3.7
LGA 1 2.4 2.1 4.7
SGA no difference
Jensen et al, Diab Care 2005
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Obesity and GDM; direct perinatal
outcomeindependent risk factors with synergistic effects
Adapted from Catalano et al, 2012
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Obesity and GDM
• Both have an (synergistic) effect on early
perinatal outcome
• But what about long term outcome of the
children?
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Mat Diabetes and Childhood obesity
meta-analysis, Philipps et al, Diabetologia 2011
All types of diabetes:
GDM:
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Mat Diabetes and Childhood obesity
meta-analysis, Philipps et al, Diabetologia 2011
All types of diabetes:
Adjusted for maternal BMI:
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Maternal overweight is the main
problem and not GDM
overweight and abdominal obesity in 16 y old adolescents
Pirkola et al, Diab Care 2010
Risk population:
-GDM 84
-Normal OGTT 657
Control 3.427
= mat BMI> 25
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Metabolic syndrome in 175 infants age 7-
11, according to birth weight and GDM
Boney, Pediatrics 2005
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A ‘typical’ US situation
• 9.835 untreated women, without severe GDM at screening,
but with an abnormal OGTT according to the IADPSG
classification in 19.2%:
• Normal weight 40%, overweight 32%, obese 28%
- 21.6% of LGA was attributable to overweight/obesity
- 23.3% of LGA was attributable to overweight/obesity+GDM
- 2.9% was attributable to GDM in normal weight women
MH Black et al, Diabetes Care 2013;36:56-62
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A ‘typical’ US situation
• 9.835 untreated women, without severe GDM at screening,
but with an abnormal OGTT according to the IADPSG
classification in 19.2%:
• Normal weight 40%, overweight 32%, obese 28%
- 21.6% of LGA was attributable to overweight/obesity
- 23.3% of LGA was attributable to overweight/obesity+GDM
- 2.9% was attributable to GDM in normal weight women
MH Black et al, Diabetes Care 2013;36:56-62
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Hongkong- 1st cohort follow-up study
• At the age of 22
Mat fasting gluc BMI
• Offspring BMI p=0.23 p<0.001
• Offspring viceral fat p=0.73 p<0.001
• Waist circumference p=0.37 p= 0.002
Tutino et al, poster ADA 2016; R.Ma, DIP Barcelona, March 8, 2017
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GDM and/or obesity; Slovenia
Non-GDM GDM
obese non-obese obese
• N 13.937 4.704 1.525
• Preeclampsia 15.5% 4.1% 14.6%
• Age at del. slightly higher - -
• BW>4.000 g 16.5% 10% 17.4%
• Ces Delivery 13.8% 20.3% 31%
Blickstein et al, JMFNMed 2017, online March 1
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Obesity and GDM
• Both have an (synergistic) effect on early
perinatal outcome
• Obesity seems to have the most important
effect on long term development of the
offspring ( especially childhood obesity)
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Maternal obesity during pregnancy and premature mortality from
cardiovascular event in adult offspring; Reynolds et al, BMJ 2013
Adjusted for mat age at delivery, socioeconomic status, birth weight, gestation at delivery
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So, which infants are likely to
develop obesity/diabetes
• Genetic predisposition ( thrifty genotype)
• High maternal BMI
• High weight gain in pregnancy
• Macrosomia at birth
• And……excessive weight gain > 2 y of age
Maternal diabetes
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Prepregnancy BMI and Gest Weight Gain in
relation to childhood obesity
BBMI
Subcutane
Adipose
Tissue
I
Waist
Circumf
HDL-c
Kaar et al, P Pediatr, 2014
Adequate W gain
Excessive W gain
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Optimal weight gain during pregnancy
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How to achieve adequate weight gain?
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RCT, from 15-18 wks onwards. n=1555,
Mean mat BMI 36
intervent control
Gest weight gain 7.19 kg 7.76 kg (s)
GDM 25% 26%
LGA 9% 8%
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• N=300, RCT, >10 wks cycling 30 min
• GDM: 22 % vs 40%
• Lower incidence of PTB, LGA
Exercise to prevent GDM
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Exercise in women with BMI>25
• 9 studies; n=1.502
• 30-60 min walking/exercise, 3-7 times/wk, >25wks
• PTB RR 0.62 (0.41-0.95)
• GDM RR 0.61 (0.41-0.90)
Magro-Malosso et al, Acta O&G Scand 2016
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RCTs metformin in Obese non-diabetic
women, started in 1st trimester
Author Inclusion N MWG BW PE Weight at
1y
Carlsen 2012 PCO 258 -1 kg - ? +0.5kg
mean BMI 30
Chiswick 2015 BMI>30 449 - - -
Cauc.only
Syngelaki 2016 BMI>35 400 -3 kg - 4fold reduction
Carlsen et al, Pediatrics, 2012; Chiswick et al, Lancet July 2015; Syngelaki et al JEJM, 2016
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Real-time CGMduring the whole of pregnancy
CGM Controls*
• N 55 22
• HbA1c 1st trim 48 mmol/mol 59
• LGA 61% 46%
De Valk et al, submitted
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RCT real-time CGMfor 6 days at 8, 12, 21, 27 and 33 wks
CGM Controls*
• N 79 75
• HbA1c baseline 6.6% 6.8%
• HbA1c 33 wks 6.1% 6.1%
• Severe hypo glyc. 16% 16%
• LGA infant 45% 34%
A.L.Secher et al, Diab Care online Jan 24, 2013; 123 type-1 and 31 type 2 diabetes; * 7
times daily self monitored plasma glucose; real-time CGM per protocol 49 (64%)
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CONCEPT Trial, Feig et al, Lancet 2017
• CBGM* Control
• N 108 107
• LGA 53% 69%
• Neon Hypo 15% 28%
• NICU 27% 43%
*=started during pregnancy,<13 wks
No apparant benefits if started preconceptionally
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• Real time glucose monitoring alone is
not sufficient to prevent large-for
gestational age infants
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RCT real-time CGM in GDM2nd half of pregnancy; n=236
LGA 13.6% vs 25.6%; PE & CSs sign lower
JCEM 2015
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Optimal weight gain during pregnancy
So,..involve a dietician !!
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So, which infants are likely to
develop obesity/diabetes
• Genetic predisposition ( thrifty genotype)
• High maternal BMI
• High weight gain in pregnancy
• Macrosomia at birth
• And……excessive weight gain > 2 y of age
Maternal diabetes
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Birthweight, Infant growth & Type-2 diabetes
(Eriksson et al, Diab Care 2003; 26: 2006-10)
Mean Z-score
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Birthweight, Infant growth & Type-2 diabetes
(Eriksson et al, Diab Care 2003; 26: 2006-10)
Mean Z-score
diabetes
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Prevention of impaired outcome
• Prevent overgrowth of the young infant
(2-7 yrs)
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Prevention
-- Healthy diet
-- Excercise
-- Folic acid
(may prevent epigenetic changes)
(Eriksson; Lillycrop et al, 2005)
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• Diet, exercise, reduction in weight gain during
pregnancy, may help in reducing impaired
outcome in obese women, but the effects will
most likely be small.
• For an effective prevention of the obesity
epidemic, prevention of childhood obesity should
be the primary goal of both doctors and
gouvernments.
Prevention of childhood obesity, that
is the solution
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Type-1, type-2 diabetes and GDMwhich infants have the highest risk of becoming obese during
childhood?
Type-1
Type 2
GDM
LGA at birth
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Type-1, type-2 diabetes and GDMwhich infants have the highest risk of becoming obese during
childhood?
Type-1 50%
Type 2 35%
GDM 20%
LGA at birth Overw 4-5 y?
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Type-1, type-2 diabetes and GDMwhich infants have the highest risk of becoming obese during
childhood?
Type-1 50% 7% (0.15)
Type 2 35% 36% (1.7)
GDM 20% 17% (0.65)
LGA at birth Overw 4-5y BMI SDs at 14y
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Childhood growth of infants of women with
type-1, type-2 and Gest diabetes (Hammoud et al,Ped
Res 2017 and Diabetologia, 2018 inpress)
Type-2
Type-1
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Childhood growth of infants of women with
type-1, type-2 and Gest diabetes (Hammoud et al,Ped
Res 2017 and Diabetologia 2018, in press)
Type-2
Type-1
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Childhood growth of infants of women with
type-1, type-2 and Gest diabetes (Hammoud et al, Ped
Res 2017 and Diabetologia 2018, in press)
Type-2
BMI 31
BMI 26
BMI 24
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So,
• Obesity is the driving factor for
impaired outcome
• With diabetes as an adjunct
factor. In GDM only for obese
women.
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So,
• Use strict threshold oGTT values in
obese women
• Be less strict in lean women
• Try to prevent obesity and high
weight gain in (before)pregnancy in
these women.
• But prevention should already start
in early childhood
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Thank you
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Type-1, type-2 diabetes and GDMwhich infants have the highest risk of becoming obese during
childhood?
Type-1 50% 7% (0.15) +0.8
Type 2 35% 36% (1.7) +1.8
GDM 20% 17% (0.65) +1.1
LGA at birth Overw 4-5y BMI SDs at 14y
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Type-1, type-2 diabetes and GDMwhich infants have the highest risk of becoming obese during
childhood?
Type-1
Type 2
GDM
LGA at birth
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February 2017
Follow-up till 6 months after birth; n=698
• Triceps skinfold thickness no sign
• Subscap skinfold thickness -0.26SD (-0.49 to -0.02)
• Most likely mediated through mat diet
• Lower mat glycemic and saturated fat intake
•
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Relationship HC/AC ratio with BMI
at 4-5 y
Hammoud et al, Neonatology, 2017
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Diet, exercise, reduction in weight gain during
pregnancy, may help in reducing impaired outcome
in obese women, but the effects will most likely be
small. For an effective prevention of the obesity
epidemic prevention of childhood obesity should be
the primary goal of both doctors and gouvernments.
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Relationship HC/AC ratio with BMI
at 4-5 y
Hammoud et al, Neonatology 2017
And who were the biggest
infants at 4-5 y of age?
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Risk of having a 40y old daughter with
overweight/obesity according to pre-pregnancy
BMI and weight gain during pregnancy
Houghton et al, AJOG 2016
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Weight gain in pregnancy( Houghton et al AJOG 2016)
Similar results
when comparing
siblings (Ester et al, Am
J Epidemiol 2017)
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It is sad that doubt is easier to
defend than having a vision
(Gerard van’t Reve)
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Botafumeiro
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University Medical Center, Utrecht, the NL
Gerard H.A.Visser
Chair FIGO Committee Safe Motherhood & Newborn Health
The impact of diabetes,
obesity and hypertension
in pregnancy
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Metabolic SyndromeSyndrome X, Insulin resistance syndrome, CHAOS
with _>3 of the following conditions:
• Abdominal (central obesity) : BMI>30
• Elevated blood pressure
• Elevated fasting plasma glucose
• High serum triglycerides
• Low high-density cholesterol (HDL)
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and Moshe,
Please change the name of your
FIGO working party from HIP (
hyperglycemia in pregnancy) to
DIP ( diabesity in pregnancy)
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Lifestyle and Nutrition, offspring 10y
type-1 type-2 GDM
Breakfast>3wk 98% 81% 98%
No snacks 4% 28% 12%
Member sportsclub 90% 67% 84%
Hammoud et al, in preparation
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University Medical Center, Utrecht, the NL
Maternal obesity or GDM;
which is the real problem?
Gerard H.A.Visser
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Metabolic SyndromeSyndrome X, Insulin resistance syndrome, CHAOS
with _>3 of the following conditions:
• Abdominal (central obesity)
• Elevated blood pressure
• Elevated fasting plasma glucose
• High serum triglycerides
• Low high-density cholesterol (HDL)
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University Medical Center, Utrecht, the NL
Maternal obesity or GDM;
which is the real problem?
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Relationship HC/AC ratio with BMI
at 4-5 y
Hammoud et al, Neonatology 2017
And who were the biggest infants
at 4-5 y of age?
type-1 type-2 GDM
Overweight 7% 36% 17%
Obese 0 18% 4%
BMI SDs +0.15 +1.7 +0.65
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Fetal growth profiles in diabetic pregnancies
Head to abdomen circumf. ratio( N. Hammoud et al, UOG 2012)
Fetal growth profiles in diabetic pregnancies
0,8
0,85
0,9
0,95
1
1,05
1,1
1,15
1,2
1,25
1,3
100 120 140 160 180 200 220 240 260 280
Gestational age in days
He
ad
to
ab
do
min
al
circ
um
fere
nce
ra
tio
(H
C/
AC
ra
tio
)
IDDM non-macrosomia
IDDM macrosomia
DM2 non-macrosomia
DM2 macrosomia
GDM non-macrosomia
GDM macrosomia
Birthweight>90th cent
Type-1-diabetes LGA
Type-1 AGA
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Which factors affect outcome in
offspring
• Genetic predisposition
• Maternal BMI
• Weight gain in pregnancy
• (Gestational) diabetes mellitus
• Macrosomia at birth
• Cesarean Delivery
• Excessive weight gain > 2 y of age
• Socio-economic circumstances
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For the time being, however, I guess
that big babies are going to stay
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And which can we change/influence?
• Genetic predisposition
• Maternal BMI
• Weight gain in pregnancy
• (Gestational) diabetes mellitus
• Macrosomia at birth
• Cesarean Delivery
• Excessive weight gain in infants > 2 y of age
• Socio-economic circumstances
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Obesity and GDM
• Both have an (synergistic) effect on early
perinatal outcome
• Obesity seems to have the most important
effect on long term development of the
offspring ( especially childhood obesity)
• Consequences for screening and management?
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• oGTT in all pregnant women around 24-28
wks
• Use strict threshold values for obese women
• And monitor weight gain in obese women
carefully with the help of dietary advices
GDM and Obesity; practical considerations
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Management of the obese patient
• Lose weight before pregnancy
• Healthy lifestyle
• Restrict weight gain during pregnancy
• First trimester screening for unrecognized type-2
diabetes ( OGTT or HbA1c)
• Metformin?
• Second trimester OGTT
• Beware of large baby and 3rd trimester onset of
GDM
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Prepregnancy counseling
• Information to the whole population
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Do you want to become pregnant?
Than first lose weight, and than we will
tell you were your puppy is……..
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Prepregnancy BMI and Gest Weight Gain in
relation to childhood obesity
BBMI
Subcutane
Adipose
Tissue
I
Waist
Circumf
HDL-c
Kaar et al, P Pediatr, 2014
Adequate W gain
Excessive W gain
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Prepregnancy counseling
• Information to the whole population
• In case of PCOS: first lose weight and than
we will treat you
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Prepregnancy counseling
• Information to the whole population
• In case of PCOS: first lose weight and than
we will treat you
• Consider bariatric surgery
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Use strict oGTT criteria in obese women
• Glucose values in obese women with a normal
oGTT are higher than those in women with
normal weight, and GDM is usually more severe
• Obesity by itself has a negative effect on
outcome
• Obesity and GDM have a synergistic effect on
direct outcome
• Diet, treatment and frequent visits may reduce
weight gain, which by itself has a positive effect
on outcome
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Which factors affect outcome in
offspring
• Genetic predisposition
• Maternal BMI
• Weight gain in pregnancy
• (Gestational) diabetes mellitus
• Macrosomia at birth
• Cesarean Delivery
• Excessive weight gain > 2 y of age
• Socio-economic circumstances
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And which can we change/influence?
• Genetic predisposition
• Maternal BMI
• Weight gain in pregnancy
• (Gestational) diabetes mellitus
• Macrosomia at birth
• Cesarean Delivery
• Excessive weight gain > 2 y of age
• Socio-economic circumstances
![Page 85: Maternal obesity is more important for long term outcome ...dtogi.ir/MckUpload/file/4_prof visser.pdf · Botafumeiro. University Medical Center, Utrecht, the NL Gerard H.A.Visser](https://reader034.vdocuments.net/reader034/viewer/2022050105/5f43e1fcbb8cc140e40a813c/html5/thumbnails/85.jpg)
And which can we change/influence?
• Genetic predisposition
• Maternal BMI
• Weight gain in pregnancy
• (Gestational) diabetes mellitus
• Macrosomia at birth
• Cesarean Delivery
• Excessive weight gain in infants > 2 y of age
• Socio-economic circumstances
![Page 86: Maternal obesity is more important for long term outcome ...dtogi.ir/MckUpload/file/4_prof visser.pdf · Botafumeiro. University Medical Center, Utrecht, the NL Gerard H.A.Visser](https://reader034.vdocuments.net/reader034/viewer/2022050105/5f43e1fcbb8cc140e40a813c/html5/thumbnails/86.jpg)
Childhood obesity in relation to
gestational weight gain
Ludwig et al, PLOS Medicine, Oct 1, 2013
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Childhood obesity in relation to
macrosomia at birth and diabetes type
Hammoud et al, in preparation
GDM
Type 2
Type-1
GDM
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Childhood obesity in relation to
macrosomia at birth and diabetes type
Hammoud et al, in preparation
T
Type-2 M
Type-2 NM
Type-1 M
Type-1 NM/
GDM M
GDM NM
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Prevention of impaired outcome
• Prevent overgrowth of the young infant
(2-7 yrs)
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Prevention
-- Healthy diet
-- Excercise
-- Folic acid
(may prevent epigenetic changes)
(Eriksson; Lillycrop et al, 2005)
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The descent of Man
Thank you
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Thank you
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Incidence of diabetes following GDM
Ratner et al, JCEM 2008
NNT 5 and 6 ,respectively
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Post partum testing following GDM
• Systemic review; 54 articles
• Postpartum testing on average in 33% of
patients (9-71%)
• With proactive patient contact programs:
60% (14-95%)
Carson MP et al, Prim Care Diabetes, Oct 2013
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Post partum testing following GDM
• Systemic review; 54 articles
• Postpartum testing on average in 33% of
patients (9-71%)
• With proactive patient contact programs:
60% (14-95%)
Carson MP et al, Prim Care Diabetes, Oct 2013
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In conclusion
• Obesity/metabolic syndromy increases
maternal and perinatal risks
• It also affects long term fetal outcome, either
directly or through an increased Cesarean
Delivery rate
• Treatment/prevention is difficult and requires
a nationwide ( gouvermental ) approach
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Metabolic SyndromeSyndrome X, Insulin resistance syndrome, CHAOS
with _>3 of the following conditions:
• Abdominal (central obesity)
• Elevated blood pressure
• Elevated fasting plasma glucose
• High serum triglycerides
• Low high-density cholesterol (HDL)
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Metabolic SyndromeSyndrome X, Insulin resistance syndrome, CHAOS
with _>3 of the following conditions:
• Abdominal (central obesity) : BMI>30
• Elevated blood pressure
• Elevated fasting plasma glucose
• High serum triglycerides
• Low high-density cholesterol (HDL)
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The Epidemic of Diabesity, 2000 and 2030
Hossain et al NEJM, 2007
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Birthweight, Infant growth & Type-2 diabetes
(Eriksson et al, Diab Care 2003; 26: 2006-10)
Mean Z-score
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University Medical Center, Utrecht, the NL
How strict should the oGTT
threshold values be?
And should they be similar for
obese-/non-obese women
Gerard H.A.Visser
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Gestational diabetes
75 g OGTT: fasting => 5.1 mmol/l
1 hour => 10.0
2 hour => 8.5
Diagnostic criteria based on 1.75 fold
increase in LGA infant
(Metzger et al, Diab Care, 2010;33:676-682)
Prevalence of GDM of
17.8%
75 g OGTT: fasting =>5.3 mmol/l
1 hour => 10.6
2 hour => 9.0
Diagnostic criteria based on 2 fold
increase in LGA infant
(E.A.Rian, Diabetologia 2011;54:480-486)
Prevalence of GDM 0f
10.5%
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• Evaluate diagnostic thresholds associated with an adverse
outcome of 2.0 in the HAPO study as opposed to 1.75
• Determine whether women, normal in a two-step strategy and
abnormal in the IADPSG model, benefit from treatment (RCT?)
• Conduct cost-benefit analyses
• Conduct research to understand patient preferences
• Study the impact of GDM treatment on care utilization
• Assess lifestyle interventions and effects of obesity
• Assess impact that a label of GDM may have on future
reproductive career
• Assess long-term outcome of GDM on offspring
• Assess interventions to decrease subsequent signs of metabolic
syndrome, diabetes and cardiovascular disease in women with
GDM
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• Evaluate diagnostic thresholds associated with an adverse
outcome of 2.0 in the HAPO study as opposed to 1.75
• Determine whether women, normal in a two-step strategy and
abnormal in the IADPSG model, benefit from treatment (RCT?)
• Conduct cost-benefit analyses
• Conduct research to understand patient preferences
• Study the impact of GDM treatment on care utilization
• Assess lifestyle interventions and effects of obesity
• Assess impact that a label of GDM may have on future
reproductive career
• Assess long-term outcome of GDM on offspring
• Assess interventions to decrease subsequent signs of metabolic
syndrome, diabetes and cardiovascular disease in women with
GDM
Too early to adopt the stringent
IADPSG oGTT criteria for universal
screening
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No data on maternal BMI
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Lowest risk of SGA/LGA, preterm delivery6.500 obese women, California
Weight gain Class 1 Class 2 Class 3
< 2.2 kg x (Black women)
2.2-5 x ( white women)
5-9 x
9.1-13.5 x
Bodnar et al, Am J Clin Nutr, 2010
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Lowest risk of SGA/LGA, preterm delivery6.500 obese women, California
Weight gain Class 1 Class 2 Class 3
Bodnar et al, Am J Clin Nutr, 2010
With an increase in Preterm delivery in
case of weight loss, in all 3 categories
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Adjusted effects of gestational weight loss,
according to maternal BMI; Bavaria, n=445.000
BMI: normal overwt Obese I II III
• PE - - -
• Em CS - -
• PT del - - -
• SGA (1.3)
• LGA - - -
• PNMort 3.1* 1.6 1.4 1.7 0.92
Beijerlein et al, BJOG 2010; * sign, corrected, but not for PTB
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Adjusted effects of gestational weight loss,
according to maternal BMI; Bavaria, n=445.000
BMI: normal overwt Obese I II III
-
(1.3)
• PNMort 3.1* 1.3 1.25 1.65 0.88
Beijerlein et al, BJOG 2010; * sign, corrected, but not for PTB
The association of GWL with a decreased risk
of pregnancy complications appears to be
outweighed by increased risk of prematurity
and SGA in all but obese class III mothers
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• Nog te includeren:
• Baric surgery
• Beperkte gewichtstoename tijdesn
zwangerschap; lange termijn gevolgen
sterke weight gain tijdends zwangerschap
• Metformine- gewichtsloss
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Antenatal interventions for overweight or obese
pregnant women: a systematic review of RCTs
BJOG: An International Journal of Obstetrics & GynaecologyVolume 117, Issue 11, pages 1316-1326, 7 SEP 2010 DOI: 10.1111/j.1471-0528.2010.02540.xhttp://onlinelibrary.wiley.com/doi/10.1111/j.1471-0528.2010.02540.x/full#f4 D Dodd et al BJOG, 2010
Random
effects
model
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Adjusted effects of gestational weight loss,
according to maternal BMI; Bavaria, n=445.000
Beijerlein et al, BJOG 2010; adjusted for Pregest diab.,f.sex, parity, mat age and preterm delivery
Dataset of 710.000 singleton deliveries in Bavaria (2000-2007)
Gest Weight Loss Normal WG Excessive WG
Underweight > 18 kg
Normal weight >16 kg
Overweight > 11.5 kg
Obese > 9 kg
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Adjusted effects of gestational weight loss,
according to maternal BMI; Bavaria, n=445.000
Beijerlein et al, BJOG 2010; adjusted for Pregest diab.,f.sex, parity, mat age and preterm delivery
Dataset of 710.000 singleton deliveries in Bavaria (2000-2007)
Gest Weight Loss Normal WG Excessive WG
Underweight > 18 kg
Normal weight >16 kg
Overweight > 11.5 kg
Obese > 9 kg
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The potential hazards of GWL
cannot be underestimated and the
practice cannot be recommended
Dodd & Robinson, Evid Based Med, Aug 2011
Commentary to the German study
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Antenatal interventions for overweight or
obese pregnant women: a systematic review
of randomised trials
BJOG: An International Journal of Obstetrics & GynaecologyVolume 117, Issue 11, pages 1316-1326, 7 SEP 2010 DOI: 10.1111/j.1471-0528.2010.02540.xhttp://onlinelibrary.wiley.com/doi/10.1111/j.1471-0528.2010.02540.x/full#f3
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It used to be quiet on the GDM front
• GDM a diagnosis still looking for a
disease
• Just another routine test to tell 2.3% of
pregnant women that they have a disease
• GDM is the mere interpretation of a
laboratory test
• Antenatal scare, not care
Liu et al, 2000; Odent 2008
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Treatment of GDM improves outcome
• Mortality
• Birth trauma 50% reduction
• LGA
• % CS ( Landon et al, only)
Crowther et al, 2005; n=1000; London et al, 2010, n=958
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HAPO
(NEJM, May 8, 2008)
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Gestational diabetes
glucose
Birth
Weight
>90th
centile
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So we may conclude that…….
• oGTT threshold values will –by definition-
be arbitrary, given the linear relationship
between glucose values and impaired
outcome
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75 g OGTT: fasting => 5.1 mmol/l
1 hour => 10.0
2 hour => 8.5
Diagnostic criteria based on 1.75 fold
increase in LGA infant
(Metzger et al, Diab Care, 2010)
Prevalence of GDM of
17.8%
Gestational diabetes according to the
IADPSG
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It is the question if are we ready
for such an increase in GDM?
• Don’t we make the healthy sick( stop harming the healthy, Moynihan et al, BMJ 2012)
• Does outcome really improve
• Shouldn’t we look more for women with
risk factors
• Etc
• etc
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‘Preventing overdiagnosis: how to
stop harming the healthy’ Moynihan et al, BMJ 2012
Drivers for overdiagnosis:
• Technological changes detecting even smaller
abnormalities
• Commercial and professional vested interests
• Conflicting panels producing expanded disease definitions
and writing guidelines
• Legal incentives that punish underdiagnosis but not
overdiagnosis
• Health system incentives favoring more tests and
treatments
• Cultural belief that more is better
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Gestational diabetes
75 g OGTT: fasting => 5.1 mmol/l
1 hour => 10.0
2 hour => 8.5
Diagnostic criteria based on 1.75 fold
increase in LGA infant
(Metzger et al, Diab Care, 2010;33:676-682)
Prevalence of GDM of
17.8%
75 g OGTT: fasting =>5.3 mmol/l
1 hour => 10.6
2 hour => 9.0
Diagnostic criteria based on 2 fold
increase in LGA infant
(E.A.Rian, Diabetologia 2011;54:480-486)
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Change diagnostic criteria for GDM?
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Change diagnostic criteria for GDM?
Visser & de Valk, AJOG, 2012
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Change diagnostic criteria for GDM?
Visser & de Valk, AJOG, 2012
√
√√
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Change diagnostic criteria for GDM?
Visser & de Valk, AJOG, 2012
√
√
6% GDM; Obesity 10 to 30%
Odds ratio for GDM= 3-4
Overall incidence GDM 10.4%
Only if post delivery care would
reduce the incidence of diabetes in
these women, or if PE and CSs
would be reduced by 0.5 and 2.7%,
respectively ( Werner et al, Diab Care 2012;
Mission et al, AJOG 2012
Yes, but also for very mild cases??
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Change diagnostic criteria for GDM?
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Metabolic syndrome in 175 infants age 7-
11, according to birth weight and GDM
Boney, Pediatrics 2005
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Obesity and GDM
• Obesity seems to have the most important
effect on long term development of the
offspring ( especially childhood obesity)
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Should we screen for GDM?
• Treatment improves outcome ( screening is
therefore useful)
• Mortality
• Birth trauma 50% reduction
• LGA
• % CS ( Landon et al, only)
Crowther et al, 2005; n=1000; London et al, 2010, n=958
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Outcome after screening is better
than outcome following symptoms
screening symptoms• N 175 74
• BMI 30 26
• GA at diagnosis (wks) 27 31
• HbA1c at diagnosis (%) 5.4 5.5
• FAC> 90th centile (%) 33 68
• Birthweight> 90th centile (%) 17 36
• Birthweight > 97.7th centile (%) 5 16
Hammoud et al, JMFNM 2012
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Screening for gestational diabetes:
• Yes, the whole population; but that does not
happen yet ! (Even in countries with ’universal’
screening only 10-90% of women will actually be
screened; Jiwani et al JMFNM 2012)
• Tell me how many GDM you want and I
will give you the formula
• Use strict criteria in obese women
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Adopt the IADPSG oGTT threshold
values
• You want to be on the safe side, but you
realise that you will most likely overtreat
the ‘healthy’.
• Moreover you realise that the oGTT has a
poor reproducibility, whereby GDM still
may emerge during the 3rd trimester
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Adopt the ‘Ryan’ oGTT threshold values (based on 2-fold increase in LGA)
• You realise that GDM has gone up due to an
increase in maternal obesity
• However, you consider evidence insufficient
for treatment of very mild increases of
glucose, apart from that in obese women
• You are prepared to participate in a RCT
treating half of the women with glucose
values in between both diagnostic threshold
values and stratifying for BMI
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Metformin: a new drug to kill the ‘dandelion root’
Tumor- initiating stem cellsMartin-Castello et al, Cell Cycle 2010
Study the safety of oral antidiabetic drugs
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Maternal obesity during pregnancy and premature mortality
from cardiovascular event in adult offspring; Reynolds et al, BMJ 2013
Adjusted for mat age at delivery, socioeconomic status, birth weight, gestation
at delivery
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Adopt less stringent thresholds
75 g OGTT: fasting =>5.3 mmol/l
1 hour => 10.6
2 hour => 9.0
Diagnostic criteria based on 2 fold increase in LGA
infant
(E.A.Rian, Diabetologia 2011;54:480-486)
Prevalence of GDM 0f
10.5%
• Create a database of women with oGTT values in between the
IADPSG thresholds and the current one, to compare outcome with
IADPSG negative women. (Bodmer-Roy et al O&G Oct 2012)
• Or better, do a RCT, with treatment or not, in women with values
in between both definitions ( clinical outcome, cost-effectiveness)
• Alternatively, one may decide to classify obese women according
to the IADPSG definitions, given the synergistic effect of both
conditions ( and considering that frequent visits and diet may
improve outcome)
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Obesity and GDM
BMI Odds ratio
20-25 1
25-30 1.6-1.7
>30 3.6-4
>40 10
Sebire et al, 2001; Baeten et al, 2001, Kumari, 2007
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South East Asia & Pacific RegionNauru 78%Tonga 70%Samoa 63%Niue 46%French Polynesia 44%
AfricaSeychelles 28%South Africa 28%Ghana 20% Mauritania 19%Cameroon (urban) 14%
South Central AmericaPanama 36%Paraguay 36%Peru (urban) 23%Chile (urban) 23%Dominican Republic 18%
North AmericaUSA 33%Barbados 31%Mexico 29%St Lucia 28%Bahamas 28%
Eastern MediterraneanJordan 60%Qatar 45%Saudi Arabia 44%Israel 43%Lebanon 38%
European RegionAlbania 36%Malta 35%Turkey 29%Slovakia 28%Czech Republic 26%
% Obese
0-9.9%
10-14.9%
15-19.9%
20-24.9%
25-29.9%
≥30%
Self Reported data
Obesity – Global prevalence
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ObesityPrevalence - Europe
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Obesity and Diabetes in the USA
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The Epidemic of Diabesity, 2000 and 2030
Hossain et al NEJM, 2007
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More diabetes, more gestational diabetes
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Visser & de Valk, AJOG 2012
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Alternatives for insulin; type-2; gest diabetes
-Glibenclamide (glyburide) ( Langer et al, NEJM 2000)
FDA Category C
-Metformin ( Rowan et al, NEJM 2008)
Metformin crosses the placenta ( fetal concentration
50% of maternal). It has been used in women with
PCOS and/or type-2-diabetes in the first half of
pregnancy and there is thus far no evidence that it
may induce congenital malformations.
However, long term follow-up data are lacking,
especially in IUGR infants
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Metformin and the risk of cancer
• Anti-angiogenetic effects, including negative effects on VEGF
• Anti-inflammatory effects
• Growth inhibitory effects
• Anti-oxidative effects
• Decreases( tumor-initiating) stem cells
Tan et al, J.Clin Endocr Metab, Dec 2010; Ersoy et al, Diab Care, 2008; Martin-Castillo Cell Cycle, 2010
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Metformin and the risk of cancer
• Anti-angiogenetic effects, including negative effects on VEGF
• Anti-inflammatory effects
• Growth inhibitory effects
• Anti-oxidative effects
• Decreases (tumor-initiating) stem cells
Tan et al, J.Clin Endocr Metab, Dec 2010; Ersoy et al, Diab Care, 2008; Martin-Castillo Cell Cycle, 2010
That appears to be good for the
prevention and/or treatment of cancer
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Metformin and the risk of cancer
• Anti-angiogenetic effects, including negative effects on VEGF
• Anti-inflammatory effects
• Growth inhibitory effects
• Anti-oxidative effects
• Decreases (tumor-initiating) stem cells
Tan et al, J.Clin Endocr Metab, Dec 2010; Ersoy et al, Diab Care, 2008; Martin-Castillo Cell Cycle, 2010
That appears to be good for the
prevention and/or treatment of cancerBut what about a nine months
exposition of the fetus ??
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MICHELIN MAN DENIES PATERNITY SUIT...... CLAIMS CHILD IS NOT HIS
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Pima Indians NIDDM
(Pettitt et al, Diabetes 1988;37:622-8)
Incidence of NIDDM in 20-24 y old offspring of:
- nondiabetic women 1.4 %
- women developing NIDDM after pregnancy 8.6 %
- women with NIDDM during pregnancy 45 %
differences persist taking into account paternal diabetes, age at
onset diabetes in parents, birth weight
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Type-2 diabetes or impaired glucose intolerance
in 18-27 y offspring ( total study group 597)
• Women with gest diabetes 21%
• Genet predisposed women 12%
( but no diabetes in pregnancy)
• Women with type-1 diabetes 11%
• Control group 4%
Clausen et al, Diab Care 2008;31:340-6
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Type-2 diabetes or impaired glucose intolerance
in 18-27 y offspring ( total study group 597)
• Women with gest diabetes 21%
• Genet predisposed women 12%
( but no diabetes in pregnancy)
• Women with type-1 diabetes 11%
• Control group 4%
Clausen et al, Diab Care 2008;31:340-6
So, diabetes during pregnancy results in an almost
10% incidence of diabetes in offspring
9%
7%
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So,
• Abnormal intrauterine environment induces
DM and obesity in offspring
• Most studies were not controlled for
maternal BMI
• Is remains uncertain whether GDM or
Obesity is the factor most strongly related
to obesity in offspring
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However,
• Given the synergistic effect of Obesity and
GDM, be very strict in diagnosing and
treating Obese women who have GDM
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More diabetes, more gestational diabetes
75 g OGTT: fasting => 5.1 mmol/l
1 hour => 10.0
2 hour => 8.5
Diagnostic criteria based on 1.75 fold
increase in LGA infant
(Metzger et al, Diab Care, 2010;33:676-682)
75 g OGTT: fasting =>5.3 mmol/l
1 hour => 10.6
2 hour => 9.0
Diagnostic criteria based on 2 fold
increase in LGA infant
(E.A.Rian, Diabetologia 2011;54:480-486)
-Poor reproducibility of OGTT
-Glucose weak predictor of LGA
-Obesity is a stronger predictor
-GDM is only related to
childhood obesity in case of
maternal obesity (Pirkola et al, 2010)
-Economic factors
-On the other hand: treatment is
relatively easy ( insulin in only
8-20 % of women)
(Rian, 2011; RCOG SACO paper 23,
January 2011)
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More diabetes, more gestational diabetes
75 g OGTT: fasting => 5.1 mmol/l
1 hour => 10.0
2 hour => 8.5
Diagnostic criteria based on 1.75 fold
increase in LGA infant (IADPSD)
(Metzger et al, Diab Care, 2010)
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South East Asia & Pacific RegionNauru 78%Tonga 70%Samoa 63%Niue 46%French Polynesia 44%
AfricaSeychelles 28%South Africa 28%Ghana 20% Mauritania 19%Cameroon (urban) 14%
South Central AmericaPanama 36%Paraguay 36%Peru (urban) 23%Chile (urban) 23%Dominican Republic 18%
North AmericaUSA 33%Barbados 31%Mexico 29%St Lucia 28%Bahamas 28%
Eastern MediterraneanJordan 60%Qatar 45%Saudi Arabia 44%Israel 43%Lebanon 38%
European RegionAlbania 36%Malta 35%Turkey 29%Slovakia 28%Czech Republic 26%
% Obese
0-9.9%
10-14.9%
15-19.9%
20-24.9%
25-29.9%
≥30%
Self Reported data
Obesity – Global prevalence
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Obesity and Diabetes in the USA
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Maternal overweight is the main
problem and not GDM
overweight and abdominal obesity in 16 y old adolescents
Pirkola et al, Diab Care 2010
Risk population:
-GDM 84
-Normal OGTT 657
Control 3.427
= mat BMI> 25
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Obesity and GDM
• Obesity seems to have the most important
effect on long term development of the
offspring ( especially childhood obesity)
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Obesity and GDM
• Both have an (synergistic) effect on early
perinatal outcome
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Overweight and pregnancy
• GDM
• Macrosomia
• C.section
• Hypertension
• Preterm delivery
• Post operative complications
• Congenital malformations
• Fetal death
• Neonatal morbidity
Odds ratios 2-3
After Jensen et al, 2003
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Childhood obesity in relation to
macrosomia at birth and diabetes type
Hammoud et al, in preparation