Contraceptive Pills: Risks of Pregnancy After Six Days - Obstetrics and Gynecology

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Sixth day of taking pre-exposure prophylaxis (PrEP)?


Hello doctor, I am a patient with polycystic ovary syndrome (PCOS).
I have been taking traditional Chinese medicine for regulation.
My last menstrual period started on May 11, and this month it also started on the 11th.
This is my first time taking the emergency contraceptive pill.
I would like to ask if I start taking it on the third day of my menstrual period, June 13, and if I have unprotected intercourse after taking it for six days, is there a chance of getting pregnant?

An An, 20~29 year old female. Ask Date: 2023/06/15

Dr. Zhang Kunmin reply Obstetrics and Gynecology


Hello, the first time you take birth control pills, it is recommended to start on the first day of your menstrual cycle.
If you begin taking the pills after the second day of your period, it is advised to use additional contraceptive measures for the first seven days of pill use.
If you do not experience expected withdrawal bleeding during the placebo week of continuous pill use, you should suspect the possibility of pregnancy.
Thank you! Wishing you peace and health.
Dr.
Zhang

Reply Date: 2023/06/15

More Info


When it comes to understanding contraceptive pills and their effectiveness, especially in the context of a polycystic ovary syndrome (PCOS) patient, it's essential to consider several factors.
Firstly, contraceptive pills, when taken correctly, are highly effective in preventing pregnancy. The effectiveness of these pills typically reaches about 99% when taken consistently and correctly. However, it’s important to note that the timing of when you start taking the pills can influence their effectiveness.

In your case, you mentioned starting the contraceptive pill on the third day of your menstrual cycle, which is generally considered a good time to begin taking the pill. Most healthcare providers recommend starting the pill at least seven days before engaging in unprotected intercourse to ensure maximum effectiveness. Since you started on the third day of your cycle and continued for six days, you would have been on the pill for a sufficient amount of time to provide protection against pregnancy, assuming you took the pills as directed.

However, if you had unprotected intercourse during the first week of taking the pill, there is still a slight risk of pregnancy. This is because it typically takes about seven days for the pill to become fully effective in preventing ovulation. If you had unprotected sex before the seventh day of taking the pill, there is a chance that ovulation could occur, leading to a potential pregnancy.

Moreover, since you are a PCOS patient, it’s important to consider that this condition can sometimes affect the regularity of your menstrual cycle and ovulation patterns. While the pill is designed to regulate your cycle and prevent ovulation, individual responses can vary. If you have any concerns about how PCOS may be affecting your contraceptive effectiveness or your menstrual cycle, it would be wise to consult with your healthcare provider for personalized advice.

In terms of the risk of pregnancy after six days of taking the pill, if you have taken the pills consistently and correctly, the risk is significantly reduced. However, if you are still concerned about the possibility of pregnancy, you may consider using a backup method of contraception, such as condoms, until you are confident that the pill is fully effective.

Lastly, if you experience any unusual symptoms or have concerns about potential pregnancy, it’s advisable to take a home pregnancy test or consult your healthcare provider for further evaluation. They can provide you with the most accurate information based on your specific health situation and help you navigate any concerns regarding your contraceptive methods and overall reproductive health.

In summary, while starting the pill on the third day of your cycle and taking it for six days does provide a level of protection against pregnancy, it is crucial to ensure that you are consistent with your pill-taking and to be aware of your body’s responses, especially with a condition like PCOS. Always feel free to reach out to your healthcare provider for any questions or concerns regarding your contraceptive methods and reproductive health.

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