What Is Implantation Dip? Does BBT Drop?

You might have heard of a dip in the pool, the Big Dipper, but an implantation dip? You might be scratching your head right now; it’s not something the man, or any woman, on the street in any country will know about. However, it is a relatively well-known fact in the United States that, if you see an implantation dip, you’re looking at a sign of pregnancy. This time, let’s look at what this dip is all about, and what connection it has with pregnancy. When does it occur? Why is there a drop in basal body temperature (BBT)? What kind of pattern does the BBT chart have? It’s time to get some answers.

Implantation dip: Definition

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An implantation dip refers to the day in which your basal body temperature dips suddenly after it was in a high range for a period of time. When your BBT drops, it means that implantation has taken place and this is considered one of the early signs of pregnancy.

Why does implantation dip happen?

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Progesterone is secreted in large amounts and it causes your body temperature to go up and stay in a high range. When pregnancy is established, progesterone continues to be secreted in high amounts, and even when your expected menstrual period date has passed, you’ll still have a high temperature. On the other hand, if your BBT drops suddenly and stays in the low range, then that means pregnancy was not established and so your BBT returns to normal levels.

However, in recent years, the appearance of a sudden dip in body temperature has been widely recognized and welcomed as a sign of pregnancy.

But why does your BBT drop when implantation takes place? There is no exact explanation for this yet. The truth of the matter is still uncovered – there is no scientific explanation that can connect the dots between the process of implantation and the effect it has on basal body temperature.

When does the implantation dip happen? Changes in BBT?

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During a normal menstrual period, one’s basal body temperature alternates between high and low ranges. A high BBT is recorded during the period starting from the start of your period to a few days after ovulation takes place. An implantation dip, however, breaks this pattern and is the drop in body temperature sometime around Day 7 to Day 10 – when ovulation happens.

How many days does implantation dip last?


Implantation dip usually takes place over a period of 1 to 2 days, and if a low temperature is recorded for 3 days, it means that the body has returned to temperatures of normalcy and that pregnancy is not established. If the period of high temperatures ends around Day 10, there is a possibility of a Luteal Phase Defect – a luteal phase shorter than the usual and signals a problem with progesterone insufficiency and the inability of the endometrium to develop.

Implantation dip: A sign of pregnancy?

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An implantation dip is not necessarily a sign of pregnancy – it can be seen in the BBT charts of women who are not pregnant as well. This shows that an implantation dip cannot be taken as the only sign that pregnancy has been established.

There are countless of instances in which women see an implantation dip and are overjoyed with the fact that they are pregnant, but end up disappointed. In such cases, there is a possibility that there were errors in measurement and recording. Take into consideration that the female body changes in response to small stimuli, and so body temperatures fluctuate and measurements might not always be accurate.

In order to be able to get accurate results from your BBT chart and to deduce if the implantation dip is really a sign of pregnancy, you first need to be sure that you’re measuring your temperature the right way. What you should do is this: After you open your eyes, don’t move. Simply grab your thermometer, and measure your temperature where you are. When your brain becomes more active, there will be changes in your hormone levels, and this will result in changes in your body temperature. Record the first reading you get from the thermometer.

When you catch a cold or are not feeling well, the hormone levels in your body might change. Staying up through the night or drinking might cause you to wake up later, resulting in a drop in the BBT recorded. Even if your BBT drops, wait for a few days to see if it’s in actual fact, really an implantation dip or not.

Implantation dip: Too early to tell

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Seeing your temperature drop after a few days of high BBT can be a pleasant surprise to you, or if you have been dreaming of this day to come, you might just have landed onto cloud nine. Although an implantation dip is a sign of pregnancy, don’t jump the gun – wait until it’s confirmed first before you start preparing yourself for pregnancy. As there is no scientific explanation for the implantation dip, you shouldn’t feel devastated if your body temperature doesn’t drop. Either way, it’s still too early to be sure.

When you see the implantation dip in your BBT chart, you will know if your ovulation day has passed, or if there is a possibility of you being pregnant. What you can do is this – measure your temperature diligently, and take good care of yourself. If you have any worries, don’t stress yourself out by worrying alone and consult your practitioner about it instead.