Pregnancy Risk After Unprotected Intercourse: Your Questions Answered - Obstetrics and Gynecology

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Hello doctor, my menstrual period started on September 21 and today is the fifth day.
I had unprotected intercourse with my boyfriend, but he did not ejaculate.
I am very worried.
I took emergency contraceptive pills within two hours.
Can you please tell me if there is a chance of pregnancy? Thank you, doctor.

Pp, 20~29 year old female. Ask Date: 2019/09/25

Dr. Huang Jianzhong reply Obstetrics and Gynecology


On September 21, my period started, and today is the fifth day.
I had unprotected intercourse with my boyfriend, but he did not ejaculate, and I am very worried.
I took emergency contraception within two hours.
I would like to ask the doctor if there is a chance of pregnancy.
Answer: The chance of pregnancy in this situation is very low.

Reply Date: 2019/09/25

More Info


When it comes to understanding the risks of pregnancy after unprotected intercourse, it's essential to consider several factors, including the timing of the menstrual cycle, the effectiveness of emergency contraception, and individual health circumstances.

Firstly, you mentioned that you had unprotected intercourse on the fifth day of your menstrual cycle. Typically, ovulation occurs around 14 days before your next period, which means that during the early days of your cycle, you are generally less likely to conceive. However, sperm can survive in the female reproductive tract for up to five days, so if you have a shorter cycle or if you ovulate early, there is still a possibility of pregnancy.

Taking emergency contraception (EC) within two hours of unprotected intercourse is a proactive step. Emergency contraceptive pills (ECPs), such as Plan B or Ella, are designed to prevent ovulation or fertilization if taken within a specific time frame after unprotected sex. Plan B is most effective when taken within 72 hours, while Ella can be effective up to 120 hours after intercourse. The sooner you take it, the better the chances of preventing pregnancy.
In your case, since you took the emergency contraception within two hours, you have maximized your chances of preventing an unintended pregnancy. However, no method of contraception is 100% effective, and there is still a small risk of pregnancy even after taking EC.

It's also important to note that if you experience any unusual symptoms or a missed period in the coming weeks, you should take a pregnancy test to confirm your status. If you have any concerns about your menstrual cycle or reproductive health, consulting with a healthcare provider is always a good idea.

In summary, while the risk of pregnancy after unprotected intercourse during the early days of your menstrual cycle is relatively low, taking emergency contraception significantly reduces that risk. If you have further questions or concerns about your reproductive health, don't hesitate to reach out to a healthcare professional for personalized advice and support.

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