basal body temperature (bbt)

7/28/2019 Basal Body Temperature (Bbt)

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BASAL BODY

TEMPERATURE (BBT)


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Objectives

Explain BBT as a method on NFP Conduct initial instruction on the use

of BBT method

Distinguish the fertile and infertilephases of the menstrual cycle usingthe BBT

Explain BBT rules to postponepregnancy


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BBT definition

Is a method in identifying the fertileand infertile period of a womans cycleby daily taking and recording of the risein body temperature during and after

ovulation. Is the temperature of the body at rest

at least 3 hrs. of continuous sleepbefore temperature taking

A womans BBT rises during ovulationperiod and stays high until the nextmenstruation due to rise inprogesterone level.


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How to take the

temperature Use an ovulation thermometer Take the temperature every morning upon

waking and before any activity Thermometer is placed under the tonqueor the axilla for five minutes

Be consistent in using the thermometer

Use the same route throughout cycle one


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How to record

After taking the temperature, recordreading immediately

If the mercury is between two readings,

always chart the highest reading Record by placing a dot at the center of

the box

Connect dots marking the temperature ona daily basis


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Who records Ideally the husband, however if he isnot around, the woman can do it

herself


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How to establish cover

line (WHO) Identify the first 10 temperature reading

of the cycle

Disregard temperature on days 1-5 Find the highest temperature on days 6-10 Disregard any temperature that is

abnormally high due to illness

Draw a horizontal line along the highesttemperature on days 6-10. This is theCOVERLINE


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How to find the thermal

shift The temperature usually rises (from .4*Fto 1*F or from .05*C to .20*C)above thehighest of the previous low temperaturepattern. This is called the thermal shift.

Once the temperature has remained highfor 3 consecutive days, ovulation has

occured


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Fertile and infertile days?

After the coverline has been established,count the first 3 consecutive temperatureabove this cover line and mark 1,2,3

Draw a vertical line between 2 and 3

Fertile days are to the left of the verticalline and infertile days are all days to theright of the vertical line

Establish the pattern of use for 3 months

and discuss with a service provider toassist in interpreting the data


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BBT Rules to Postpone

Pregnancy Lovemaking or intercourse can bedone during the third day of the

thermal shift until the end of thecycle. (Post Ovulatory or InfertilePhase

Intercourse is to be avoided duringfertile days to prevent pregnancy


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Guidelines for achievingpregnancy

A woman who wants to have a child canpractice the BBT method by doing thefollowing:

Observe the signs and symptoms of themenstrual cycle Time the sexual intercourse during the

fertile period for a day or two between

each intercourse so that the husbandssemen will have the maximum number ofsperms.


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Guidelines for achieving

pregnancy Take the basal body temperature

daily. If the temperatureremains elevated for a longerperiod than the previous

menstrual cycle, it is likely thatshe is pregnant.


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Effectiveness

Perfect use : 99 percent

Typical use : 80 percent


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Advantage/Disadvantage

It can be used by any woman ofreproductive age who is willing to takeand chart her BBT daily and practiceabstinence during fertile periods.

There are no medical precautionsagainst the use of BBT. However, thefollowing conditions can affect the BBT:

*Sore throat, colds and flu, fever,toothache, vomitting, diarrhea,anxiety, sunburn, medication,travel, sleep disturbance and

alcoholic beverages.


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BBT

HANDS ON EXERCISE
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basal body temperature (bbt)

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