Can You Get Pregnant with PCOS After Unprotected Sex? - Obstetrics and Gynecology

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I have polycystic ovary syndrome (PCOS) and took the emergency contraceptive pill on the 11th day of taking the birth control pill.
I had unprotected intercourse with my boyfriend.
Is there a chance I could get pregnant? Do I need to take a second dose of emergency contraception?

Wán zhī, 10~19 year old female. Ask Date: 2018/09/05

Dr. Huang Jianzhong reply Obstetrics and Gynecology


I have polycystic ovary syndrome (PCOS).
Yesterday, I took the 11th pill of my birth control regimen and had unprotected intercourse with my boyfriend.
Is there a chance I could get pregnant? Do I need to take emergency contraception? Answer: There is no risk of pregnancy in this situation, and you do not need to take emergency contraception.

Reply Date: 2018/09/05

More Info


Polycystic Ovary Syndrome (PCOS) is a common hormonal disorder that can affect a woman's ability to conceive. Women with PCOS often experience irregular menstrual cycles, which can make predicting ovulation difficult. This unpredictability can lead to concerns about pregnancy, especially in situations involving unprotected sex.

In your case, you mentioned that you have PCOS and that you engaged in unprotected sex after taking emergency contraception (the "morning-after pill"). It’s important to understand how emergency contraception works and the implications of having unprotected sex after taking it.

Emergency contraception is designed to prevent pregnancy after unprotected intercourse. It works primarily by delaying ovulation. If you have already ovulated, the effectiveness of the emergency contraception diminishes significantly. Since you mentioned that you took the emergency contraception on the 11th day of your cycle, it is crucial to consider whether you were close to ovulation during that time. For many women with regular cycles, ovulation typically occurs around 14 days before the next period. However, with PCOS, cycles can be irregular, and ovulation may not occur at the expected time, making it harder to determine your fertile window.

If you had unprotected sex after taking the emergency contraception, there is still a possibility of becoming pregnant, especially if ovulation occurred around that time. The effectiveness of emergency contraception is highest when taken as soon as possible after unprotected intercourse, ideally within 72 hours, but it can be effective up to 5 days after. However, its effectiveness decreases the longer you wait.

Given your situation, if you are concerned about the possibility of pregnancy, it may be wise to take a pregnancy test if your period is late or if you experience any symptoms of pregnancy. If you are still within the window for taking emergency contraception (up to 72 hours after unprotected sex), you might consider consulting with a healthcare provider about whether you should take another dose or if there are other options available.

Regarding your question about whether you should take additional emergency contraception, it is generally not recommended to take more than one dose of emergency contraception within the same cycle unless advised by a healthcare professional. If you are unsure about your risk of pregnancy or the effectiveness of the emergency contraception you took, it is best to consult with your healthcare provider for personalized advice.

In terms of future fertility, having PCOS does not mean that you cannot conceive. Many women with PCOS can and do become pregnant, although they may face challenges such as irregular ovulation. If you are planning to conceive in the future, it may be beneficial to discuss with your healthcare provider about managing your PCOS, which may include lifestyle changes, medication to regulate your menstrual cycle, and monitoring ovulation.

In summary, while there is a possibility of pregnancy after unprotected sex, especially with PCOS, the use of emergency contraception can significantly reduce that risk if taken correctly. If you have concerns about your reproductive health or family planning, it is always best to seek guidance from a healthcare professional who can provide tailored advice based on your specific circumstances.

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