Emergency Contraceptive Pills: Am I at Risk of Pregnancy?

Emergency contraceptive pill

Hello Doctor: My period started on June 1, and I usually have a regular cycle of 25 days.
I had unprotected intercourse with my boyfriend on June 19, and I took the emergency contraceptive pill (Ella) within two hours.
I did not experience any side effects or bleeding.
My next period is expected on June 26.
Is there a chance I could be pregnant?

Nìmíng, 20~29 year old female. Ask Date: 2016/06/23

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, the effectiveness of emergency contraception is about 90%, so the chance of pregnancy is low.
It is best to use preventive measures beforehand.
Wishing you good health.

Reply Date: 2016/06/23

More Info

When it comes to emergency contraceptive pills (ECPs), such as the one you mentioned (often referred to as "Plan B" or "morning-after pill"), they are designed to prevent pregnancy after unprotected intercourse. In your case, since you took the ECP within two hours of having unprotected sex, you significantly reduced your risk of becoming pregnant.

ECPs work primarily by delaying ovulation. If taken before ovulation occurs, they can prevent the release of an egg from the ovary. If ovulation has already occurred, ECPs may not be effective. Given that your menstrual cycle is typically 25 days, and you had unprotected intercourse on June 19, it is important to consider where you are in your cycle. If you were approaching ovulation, the effectiveness of the ECP might be slightly reduced, but taking it promptly, as you did, is crucial.

The absence of side effects or bleeding after taking the ECP is not uncommon. Many women do not experience any adverse reactions, and the lack of bleeding does not indicate that the pill was ineffective. You can expect your next period around June 26, but it is worth noting that ECPs can sometimes cause changes in your menstrual cycle. Your period may arrive earlier or later than expected, and the flow may be lighter or heavier than usual.

To address your concern about the risk of pregnancy: since you took the ECP within the recommended time frame, the likelihood of pregnancy is low. However, no contraceptive method is 100% effective, so if your period is more than a week late, it would be wise to take a pregnancy test to confirm whether or not you are pregnant.

In summary, based on the information provided, you have taken the necessary steps to minimize your risk of pregnancy after unprotected intercourse. It is always a good practice to consult with a healthcare provider if you have further questions or concerns about your reproductive health or contraceptive options. They can provide personalized advice based on your medical history and current situation.

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