Pregnancy Tips

Basal Temperature When Pregnant

The basal body temperature (BBT) gives you an idea if you ovulated and conceived in any particular month. If we define Basal Body Temperature in pregnancy, then it is the lowest temperature attained by a body in 24 hours at rest.When it feels like cramps in early pregnancy 4 weeks,BBT is taken each day in every morning at fix time for an entire month and charted every day.

Once you follow the same practice for few months, you will find the clear pattern of temperature dips and rises when you go through your monthly cycle due to hormonal change. The Basal Body Temperature in pregnancy is a useful tool  because once you conceive, it does not drop until after delivery of the baby.

In a previous article, we have discussed Basal Body Temperature and how to measure. Today, in this article we will provide you with more deep information of BBT that will help you to find how to understand BBT, charting and detecting the chance of cervical mucus, and much more.

Basal Body Temperature in pregnancy

As I earlier said your basal body temperature is the lowest temperature for 24 hours in a day. Why we take a BBT in the morning because when you sleep, it drops and does not raise back to normal until you start moving and working. And that’s why you need to take a temperature reading as you wake up and get out of bed with the mercury thermometer.

During your menstruation cycle, for first that is before the period, your Basal Body Temperature in pregnancy will pretty steady, after that during ovulation, it will slightly drop, and after ovulation, it goes back up. So if your temperature rises to a certain degree and stays elevated in the morning, then there is a good chance of conceiving. For example:

Day 1 to 13 Average basal temperature before ovulation is 97.0 ° F to 97.5°F
Day 14 (Approximate) Drop in temperature from 96.2 ° F to 96.9° F
Day 15 through 30 Temp goes back up 97.0 ° F to 97.5° F
During Conception BBT will spike and stay high at 97.9° F to 98.9° F

So above are the example of women’s body temperature and its response to hormonal changes. For each woman, the chart and changes may vary. To know your Basal Body Temperature in pregnancy changes and response you have to chart it on a daily basis. After drafting, you will find that the temperature of the beginning days of the mensuration month stays in fix pattern and drop slightly around day 12 to 16 and then again rise until next period. Even when your mensuration period is near to arrive, the temperature drops slightly and remains same for like the first week of the previous month.

In case if you succeed in conceiving, you will not find the lower shift in temperature. Instead of it, basal temperature elevated as you can see your period date is gone. So by this way, you can find that you conceive or not in particular month.  After charting for 3-6 months or more when you get pregnant, you will notice a difference in a regular pattern which is shown in the image below:

Basal Body Temperature in pregnancy

Image 1: Basal Temperature When Pregnant (Sample/example)

Basal Body Temperature in pregnancy

Image 2: Sustained High Basal Temperature Means You Are Pregnant (Sample/example)

Charting Cervical Mucous

With BBT, cervical mucus will also show changes at different phases of your body and mensuration cycle. On the days of a period, it will be blood from 1-7 days. These days depends on how long your period lasts. After that, it will gradually begin to change. Starting from dry or no mucus present to egg white cervical mucus, it will change daily from week two.

Check the table below and find the changes and types of cervical mucus according to approx. Time:

Day 1-7 Red/Blood (marked with an “R” or “B” on your chart)
Day 8-9 Dry or no mucus present (marked with a “D” on your chart)
Day 10-11 Sticky and feels tacky (marked with an “S” on your chart)
Day 12 Creamy and watery lotion like mucus (marked with a “C” on your chart)
Days 13- 14
Egg-white like cervical mucus which is very thin, clear and stretches between your fingers.
The last type of mucus is fertile mucus that helps sperms to reach the eggs. It only happens when you ovulate (marked with “EWCM” on your chart).

On days 15 to next period mucus may return to sticky, dry or creamy again until your period starts. It changes from woman to woman.

The 13th or 14th day (when you marked EWCM on your chart) to this type of mucus go away are most fertile days of your cycle

So when you combine both techniques, i.e., BBT and cervical mucus, you can accurately predict the time of ovulation, and also you conceive or not. Here is a sample chart:

Basal Body Temperature in pregnancy

Figure 3: Cervical Mucus and Basal Temperature Chart When Not Pregnant (Sample)

How to Check Your Basal Temperature

So far we have seen the changes in basal temperature, and cervical mucus changes not let’s move on to how to check your basal temperature throughout the cycle and where to start?

On the first day of period start to note down the temperature and note it down as day one and continue. Measure temperature in the morning before you go out of bed. With the temperature also note down your cervical mucus as “R” or “B”/ “D”/”S”/”C” every day.

Keep the thermometer, pen, and paper near to your bed so in the morning you don’t have to stand to take all such things. As soon as you woke up, you have first to measure the temperature. Do not move from bed before it otherwise it can raise the temperature.

Check your cervical mucus after once your ends. For that place your fingers all the way up to your cervix and removing some. Rub the mucus between your fingers and check if it appears like egg white or sticky or creamy. Chart both the things and also note down if you had sex and intercourse.

At the end of month connect all the dots of chart and find changes in temperature before next period like it rises or drops or when you ovulated or when you had intercourse. For the first cycle the data might look incomplete but after 3 to 4 cycle you may find your ovulation days and the date of the period or if you should take a pregnancy test or not.

At the time of pregnancy also you can use the basal temperature. Notice few day ovulation; you will find a slight lower shift in temperature. This drop is known as “implantation dip” which is another sign of very early pregnancy. Some people report that they get positive test shortly after this dip.


It is all about what’s the Basal Body Temperature in pregnancy when one get these tiny cramps in early pregnancy 4 weeksHopefully, you find it useful. If it so, then like it, share it and also leave your views in the comment section below. Note that this article is for information purpose only. Before taking any steps visit your health care consultant to know more about it. Thank you!

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Khushboo Patel

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