dr uma.t department of obstetrics and gynecology sat hospital,government medical college trivandrum
TRANSCRIPT
Dr Uma.TDepartment of Obstetrics and Gynecology SAT Hospital,Government Medical College Trivandrum
Recurrent miscarriages
≥ 3 consecutive losses before 20 weeks of gestation or less than 500 gms.
•Primary recurrent pregnancy loss" refers to couples that have never had a live birth,
•while "secondary RPL" refers to those who have had repetitive losses following a successful pregnancy
Incidence • 1% of all pregnancies. • 10 -15 % clinically recognized
pregnancy end in miscarriage( RCOG )
12-15%2%
30%Preclinical loss
Clinical pregnancy
Failure of implantation
Early pregnancy loss
Miscarriage
Live birth
30 %
30%
12 – 15 %
25%
RISK FACTORSNumber of miscarriage Increasing maternal & Number of miscarriage Increasing maternal &
paternal agepaternal age 15% after 1 loss 24% after 2 losses 30% after 3 losses 40% after 4 losses.
RISK DECREASES AS DURATION OF PREGNANCY
INCREASES
1.Endocrinological disorders2 Infections3.Environmental factors4.Smoking5.Maternal systemic diseases
When to start investigating?no specific number or criteriathat justifies evaluation for
RPL or defines the scope of
investigation Usually ……. ≥ 3 pregnancy losses
Investigate after 2 losses if ●Female partner > 35 yrs
●Infertility●Foetal heart activity
observed in any of the pregnancy losses
●Normal karyotype of conceptus
24 % …. After 2 clinically recognized losses
30 % …. After 3
40 – 50 % …. After 4
Only 2 undisputed causes
●Parental chromosomal abnormality
●APLA
< 10 – 15 % of RPL
Anatomiccongenitalacquired
Thyroid ? LPD
Diabetes Mellituse
Inherited thrombophilias
Infections ? Bacterial vaginosis
Environmental exposureSmoking / Alcohol / Caffeine
APLA any trimester (T2,3> T1)
Parental chromosomal abnormalityI trimester
Uterine anomaliesII ….I …. Septate uterus
EndocrineI or late
Inherited thrombophiliasIII
InfectionsLate II / III
Environmental toxinsI/ late
Age Trimester h/o DM, thyroid dysfuntion, SLE & other
connective tissue disorder, h/o thrombotic episodes
Family history – DM, thrombosis
50 – 70 % spontaneous miscarriagesnumerical chromosomal abn
MC - Trisomy Most end in miscarriages except –
21, 18, 1322%, 5%,3%
First trimester losses
Trisomic miscarriage does not increase the risk of subsequent miscarriage ( Random events)
Structural genetic defects3 – 5 % couples with RPL
Most common-Balanced reciprocal or
Robertsonianmore frequent in female partner
> 50% live birth rate Homologous – all pregnancies affected
peripheral blood karyotyping performed.
Abnormal - Geneticist PGD – translocation carriers
Disadvantage – IVFpregnancy success lower
* without treatment > 50% live birth
2 schools of thought
1. Unnecessary & expensive luxury
2. Important to differentiateb/w those who need further evaluation from those who do not
Karyotype important
Normal
Further evaluation
Abnormal
●Aneuploidy(reassure) •Unbalanced translocation( balanced translocation in parent)
15 % of women with RPL
International Thrombosis society (2006)
One clinical & one lab criteria
Clinical criteria1. Vascular thrombosis2. Pregnancy morbidity
CLINICAL CRITERIA
Thrombosis, one or more confirmed episodes of venous, arterial, or small vessels disease
One or more unexplained fetal deaths after ten weeks of pregnancy.
Premature birth -pre eclampsia or placental insufficiency occurring before 34 weeks
Three or more unexplained consecutive spontaneous abortions less than 10 weeks.
LABORATORY CRITERIAaCL assay - aCA IgG >20GPL units aCA IgM >15MPL units 15 -20 low positive 20 - 40 moderate positive > 40 u/ml high positive.LA – KCT, aPTT, dilute Russel viper venom time. 2 positive tests at 6 weeks apart
1.Vascular thrombosis
arterialvenoussmall
vessel
2.Pregnancy morbidity●≥1unexplained deaths of a morpholgically normal fetus at or beyond 10 weeks of gest with normal fetal morphology- USS/direct exam≥ 1 premature births of a morphologically normal neonate before 34 weeks of gestation- eclampsia or preeclampsia/ features of placental insufficiency
≥ 3 unexplained consecutive spontaneous abortions before 10 weeks of gestation with maternal anatomic or hormonal abnormalities & paternal & maternal chromosomal causes to be excluded.
Laboratory criteria
1. Lupus anticoagulant (LA)..APTT2. Anticardiolipin antibody
IgG & / IgM > 40 GPL or MPLor > 99th percentile
3. Anti beta 2 glycoprotein antibody of IgG or IgM > 99th percentile
12 weeks apart
Without treatment….chance of a live pregnancy only
10%
Treatment….Aspirin & Heparin
Aspirin – 75-85 mg/day
preconceptionally
Heparin –5000 – 10,000 U s/c bdunfractionated heparinbegin at the first indication of pregnancy
Monitor platelet count
No increased risk of osteoporosis
Low molecular weight heparin equally beneficial
Once daily administration Enoxaparine (clexane) – 1mg/kg
Dalteparine (fragmin )- 100U/kg
Stop aspirin by 34 weeks Planned delivery
stop unfractionated heparin 6 hrs before deliveryLMW Heparin – 12hrs
Post natal thromboprophylaxisReintroduce following delivery
Unfractionated – 6 hrs LMW Heparin - 12 hrs
Aspirin + Heparin …. 70 % live birth rate
Aspirin alone …. 40 % only
Activated protein C Resist( Factor V Leiden gene mutation )
Deficiency of protein C/S Deficiency of antithrombin III Hyperhomocysteinemia PT gene mutation
established causes of systemic thrombosis
Pregnancy – data scarce due to low prevelance
Thrombophilia screen
Treatment of women with Inherited/acquired thrombophilias
Unfractionated / LMW Heparin
Therapeutic / Prophylactic dose
Monitor aPTT
Therapeutic dose-10,000-15,000 every 8 – 12 hrs
aPTT – 1.5-2.5LMW Heparin
Enoxaparin 40-80 mg s/c bdor
dalteparin 5000 – 10,000 U s/c bd
Prophylactic doseUnfractionated Heparin
5000 bd (I)7500 bd (II)10000 bd (III)
LMW HeparinEnoxaparin – 40 mg s/c oddalteparin - 5000 U s/c od
Usually late miscarriages ( II TM )due to associated cervical weakness
I TM also As in septate uterusIn intrauterine volume / Poor vascularity
Questionable
Patient discomfort Invasive Risk of pelvic infection Radiation exposure Not more sensitive than
pelvic USS
Investigation of choice & should be used to assess uterine
anatomy and morphology in a woman with RPL
QUESTIONABLE !
Definite history – should be done
suspicion – monitor with serial USS
Hysteroscopic septal resectionSeptate uterus with RPL
Didelphis / Bicornuate no correction
Asherman Syndromehysteroscopic lysis
Uterine leiomyomas
* submucous * large intramural - remove only if
compressing cavity
Well controlled DM and thyroid is not a risk factor for RPL
Routine screening for occult thyroid and DM ?
Uninformative(RCOG)
Progesterone supplementationInsufficient evidence in RPL
Preterm labourIVF pregnancies
Vaginal and intramuscular progesterone have comparable outcomes
This similarity may weigh in favor of vaginal route due to relative patient comfort
Fertil Steril. 2010 Feb;93(2):554-69.53
? hCG failed to show any benefit
not given
PCOS … role for prepregnancy LH suppression?
NO role as it does not improve the live birth rate
Prolactin levels?Insufficient evidence
Paternal cell immunisation 3rd party donor leucocyte Trophoblast membranes IVIg
Not recommendedDoes not improve the
live birth rate
To be abandoned
Bacterial vaginosisI TM loss- evidence inconsistent
For women with a previous history of preterm birth- detection & treatment of bacterial vaginosis………. Prevents further preterm birth
Smoking
Alcohol
Caffeine
? Role for empirical Heparin , Aspirin
Resisted (RCOG)
In unexplained pregnancy loss , the woman should be reassured that with supportive care alone, the chance for a successful pregnancy outcome is 75%
What these women need ???
Psychological support & reassurance
Tender loving care
Thank you……..