Can You Get Pregnant After Taking Birth Control Pill for 10 Minutes? - Obstetrics and Gynecology

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Is it possible to get pregnant if I have unprotected sex ten minutes after taking the birth control pill?


My last menstrual period started on January 30.
After it ended around February 3 or 4, I began taking birth control pills on February 13.
I had intercourse just ten minutes after taking the first pill, and there was ejaculation inside.
Is there a risk of pregnancy? Does the timing of intercourse matter if it’s just a few minutes after taking the pill? I have been taking the birth control pills consistently and have not missed any doses.

Peilin, 20~29 year old female. Ask Date: 2017/02/23

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 need to be taken at the exact same time, as taking it around the same time is sufficient for contraceptive effectiveness.
If you start taking the pill on February 13th, it may not be effective due to timing.
Wishing you good health.

Reply Date: 2017/02/23

More Info


When it comes to the effectiveness of birth control pills, timing and adherence to the regimen are crucial factors. Birth control pills, when taken correctly, are highly effective in preventing pregnancy. However, the question of whether one can get pregnant after taking a birth control pill for just 10 minutes is a common concern.

To clarify, birth control pills work primarily by preventing ovulation, thickening cervical mucus to block sperm, and thinning the uterine lining to prevent implantation. For most combination birth control pills, it generally takes about 7 days of consistent use for them to become fully effective if you are starting the pill for the first time. If you start taking the pill during your menstrual cycle, you may be protected against pregnancy immediately, but this is not the case if you start taking the pill at another time.

In your case, since you started taking the pill on February 13 and had unprotected intercourse shortly after taking the first pill, the effectiveness of the pill at that moment is still uncertain. If you had just taken the pill and had intercourse within 10 minutes, the pill may not have had enough time to exert its full effect, especially since it typically requires consistent use over a week to be fully effective. However, if you continue to take the pill as directed without missing any doses, you will be protected against pregnancy after the initial 7 days.

It's also important to note that the timing of your menstrual cycle can influence the likelihood of pregnancy. If you had your last period starting on January 30 and it ended around February 4, you were likely in your fertile window around mid-February, which could increase the chances of conception if ovulation occurs.

In summary, while the risk of pregnancy exists if you have unprotected intercourse shortly after taking the first birth control pill, the likelihood of becoming pregnant decreases significantly if you continue to take the pill correctly. If you have concerns about potential pregnancy or if your menstrual cycle is irregular, it may be beneficial to take a pregnancy test or consult with a healthcare provider for further guidance.

In addition to understanding the mechanics of birth control pills, it's essential to consider other contraceptive methods if you are concerned about the effectiveness of pills or if you find it challenging to remember to take them consistently. Options such as intrauterine devices (IUDs), implants, or condoms can provide additional protection against unintended pregnancy.

Lastly, if you ever find yourself in a situation where you believe there is a risk of pregnancy despite using birth control, emergency contraception is an option that can be considered within a specific timeframe after unprotected intercourse. Always consult with a healthcare professional for personalized advice and to explore the best contraceptive options for your lifestyle and health needs.

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