Emergency Contraception and PCOS: Your Questions Answered - Obstetrics and Gynecology

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Contraceptive issues


Hello doctor, my period just ended on January 16.
However, on January 20, I had sexual intercourse with my boyfriend, and the condom broke, resulting in ejaculation inside.
I took the emergency contraceptive pill (1.5 mg) 30 minutes to 1 hour later.
Is there still a chance of pregnancy? 2.
I have polycystic ovary syndrome (PCOS).
Is it normal to feel slightly nauseous after taking the pill? 3.
Can polycystic ovary syndrome lead to infertility?

An An An, 20~29 year old female. Ask Date: 2020/01/21

Dr. Cai Yonglong reply Obstetrics and Gynecology


It is highly unlikely to become pregnant (over 85%), as it is related to the effects of medication.
Polycystic ovary syndrome (PCOS) makes conception more difficult.

Reply Date: 2020/01/21

More Info


Emergency contraception (EC) is a crucial option for individuals who experience contraceptive failure, such as a broken condom, and it can be particularly relevant for women with polycystic ovary syndrome (PCOS). Let's address your questions one by one.

1. Will I become pregnant after taking emergency contraception?
Given that you had unprotected intercourse on January 20 and took the emergency contraceptive pill (ECP) within 1 hour, your chances of preventing pregnancy are significantly increased. ECPs, such as Plan B or similar medications containing levonorgestrel, are most effective when taken as soon as possible after unprotected intercourse, ideally within 72 hours. However, they can still be effective up to 5 days after the event, though efficacy decreases over time. Since you took the pill shortly after the incident, the likelihood of pregnancy is low, but not zero. It’s important to monitor for any signs of pregnancy, such as a missed period, and consider taking a pregnancy test if your period is delayed by more than a week.

2. Is slight nausea after taking the pill normal?
Yes, experiencing mild nausea after taking emergency contraception is a common side effect. The hormones in the pill can cause gastrointestinal disturbances, including nausea, vomiting, and fatigue. If the nausea is severe or accompanied by vomiting (especially if it occurs within two hours of taking the pill), you may need to consult a healthcare provider, as you might need to take another dose or consider alternative options. Generally, these side effects are temporary and should resolve within a few days.

3. Does having PCOS mean I will be infertile?
Polycystic ovary syndrome is a common endocrine disorder that can affect fertility, but it does not mean that you will be infertile. Women with PCOS often experience irregular menstrual cycles and may have difficulty ovulating, which can make conception more challenging. However, many women with PCOS can conceive with appropriate medical intervention. Treatments may include lifestyle changes (such as weight management and exercise), medications to induce ovulation (like Clomiphene citrate or letrozole), and assisted reproductive technologies if necessary. It’s essential to work closely with a healthcare provider to develop a personalized plan that addresses your specific situation and fertility goals.

In summary, your immediate concern about potential pregnancy after taking emergency contraception is likely mitigated by your timely action. Nausea is a common side effect of the pill, and while PCOS can complicate fertility, it does not equate to infertility. If you have ongoing concerns about your menstrual cycle or fertility, consider scheduling an appointment with a gynecologist or reproductive endocrinologist who can provide tailored advice and treatment options based on your health history and reproductive goals.

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