Pregnancy Risks After Missing Birth Control Pills

Can I get pregnant?

At the end of last month, I had intercourse with my boyfriend, and we consistently take pre-exposure contraceptive pills.
However, I forgot to take them for two consecutive days right after intercourse.
I did take the missed pills afterward, but I did not take emergency contraception.
I continued taking the original pre-exposure contraceptive pills for the next five days.
What is the likelihood of pregnancy in this situation? I'm very worried because I asked at the pharmacy, and the pharmacist initially said the chances are low, so I chose not to take emergency contraception.

Hi, 20~29 year old female. Ask Date: 2016/10/08

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, you can start taking the contraceptive pill on the fifth day of your menstrual period.
It doesn't have to be taken at the exact same time; a general timeframe is sufficient.
As long as you take it regularly, it will be effective for contraception.
If you forget to take it on a particular day, you can take the missed pill the next day.
If you miss two days, there may be some risk, and you will just have to wait and see.
Wishing you good health.

Reply Date: 2016/10/08

More Info

When it comes to understanding the risks of pregnancy after missing birth control pills, it is essential to consider several factors, including the timing of missed doses, the type of birth control pill being used, and the overall effectiveness of the contraceptive method.

Birth control pills, particularly combination pills that contain both estrogen and progestin, are designed to prevent ovulation. When taken consistently and correctly, they are over 99% effective in preventing pregnancy. However, missing doses can significantly reduce their effectiveness. The general guideline is that if you miss one pill, you should take it as soon as you remember, and then continue taking the rest of the pills at your regular time. If you miss two or more pills, the recommendations can vary based on the specific pill you are using.

In your case, since you missed two consecutive pills, there is a potential risk of ovulation occurring, especially if those missed pills were during the first week of your pill pack. If ovulation occurs and you have unprotected intercourse, there is a chance of pregnancy. The fact that you resumed taking your pills afterward is good, but it does not negate the risk from the days you missed.

The effectiveness of the pill can also depend on how far along you are in your pill cycle. If you missed pills in the first week and had unprotected sex, the risk of pregnancy is higher compared to missing pills in the third week, where you might be able to skip the placebo pills and start a new pack immediately.

Regarding your concern about the likelihood of pregnancy, it is important to note that while the risk may be lower if you resumed taking the pills promptly, it is not zero. If you are particularly worried about the possibility of pregnancy, taking a home pregnancy test after a missed period can provide clarity. Additionally, if you are still within the timeframe where emergency contraception (like Plan B) is effective, you might consider discussing this option with a healthcare provider.

In summary, while the risk of pregnancy after missing two birth control pills is not negligible, it is also not guaranteed. If you are concerned about potential pregnancy, monitoring your cycle and considering a pregnancy test if your period is late would be prudent. Furthermore, if you find yourself frequently forgetting to take your pills, you might want to discuss alternative contraceptive methods with your healthcare provider that may better suit your lifestyle, such as an IUD or implant, which require less daily management.

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