Pregnancy Chances After Unprotected Intercourse: Key Insights

What is the likelihood of getting pregnant?

Hello, doctor.
Today is the 11th day after my menstrual period ended (my usual cycle is about 35-40 days, and the last one was 43 days).
Today, I suddenly noticed brown discharge.
During intercourse with my boyfriend, we discovered that the condom slipped off during withdrawal (there was no ejaculation) and got stuck at the vaginal opening.
We noticed it immediately and removed it right away.
What is the likelihood of pregnancy in this situation? Thank you!

Ms. Fang, 20~29 year old female. Ask Date: 2022/08/08

Dr. Zhang Kunmin reply Obstetrics and Gynecology

Hello, the failure rate of using condoms is still around 5%.
As long as there are active sperm in the vagina during the ovulation period, there is still a possibility of pregnancy regardless of the method of intercourse.
It is best to use emergency contraception as a remedy, but its effectiveness is not 100%, with a failure rate of about 3%.
If your period is more than a week late, it is still necessary to check for pregnancy.
Thank you! Wishing you safety and health.
Dr.
Chang

Reply Date: 2022/08/08

More Info

When considering the chances of pregnancy after unprotected intercourse, especially in the context you've described, several factors come into play. First, let's break down the situation:
1. Timing of Intercourse: You mentioned that today is the 11th day after your last menstrual period (LMP). Given your cycle length of 35-40 days, ovulation typically occurs around 21-26 days after the first day of your last period. This means that if you have a longer cycle, you may not be in your fertile window yet, as ovulation usually occurs about 14 days before your next period is due.

2. Contraceptive Failure: The fact that the condom slipped off during intercourse is a concern. Even though there was no ejaculation, pre-ejaculate fluid can contain sperm, which poses a risk for pregnancy. However, the likelihood of pregnancy from pre-ejaculate is generally lower than from ejaculate, but it is not zero.

3. Brown Discharge: The brown discharge you are experiencing could be related to several factors. It might be old blood from your previous menstrual cycle or could indicate ovulation spotting, especially if you are approaching your ovulation window. However, it is essential to monitor this symptom, as it could also indicate other issues, such as hormonal fluctuations or even early signs of pregnancy.

4. Pregnancy Testing: If you are concerned about the possibility of pregnancy, it is advisable to take a home pregnancy test (HPT) about a week after the potential conception date for the most accurate results. Testing too early may yield a false negative due to insufficient levels of the hormone hCG in your urine.

5. Emergency Contraception: If you are worried about the risk of pregnancy, consider consulting with a healthcare provider about emergency contraception options. These are most effective when taken as soon as possible after unprotected intercourse.

6. Consultation with a Healthcare Provider: If the brown discharge continues or if you experience any unusual symptoms, it would be wise to consult with a healthcare provider. They can provide further evaluation and guidance based on your specific situation.

In summary, while there is a possibility of pregnancy due to the condom slipping off, the timing of your cycle and the absence of ejaculation reduce the likelihood. Monitoring your symptoms and taking a pregnancy test after a week will provide clarity. If you have further concerns or experience any unusual symptoms, seeking medical advice is always a prudent step.

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