Can Pre-Ejaculate Fluid Cause Pregnancy on Ovulation Day?

Can pregnancy occur from pre-ejaculate fluid on the day of ovulation?

Hello, doctor.
I had unprotected sexual intercourse with my girlfriend on May 13 at 1 AM for about 7 minutes without ejaculation, during which some pre-ejaculate fluid was released.
She mentioned that her ovulation days were around May 11 and 12, and she had a lot of discharge on May 11.
I would like to ask how high the chances of pregnancy are in this situation.
Additionally, my girlfriend has mentioned that she has had two previous injuries to her uterus, which has caused her endometrium to be somewhat thin.
Could this potentially lead to infertility? I would appreciate your assistance in answering these questions.

Lin, 20~29 year old female. Ask Date: 2024/05/14

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, if you did not use complete contraception, it is advisable to take emergency contraceptive pills just in case.
A thin endometrium does not necessarily cause infertility.
Wishing you good health.

Reply Date: 2024/05/14

More Info

The question of whether pre-ejaculate fluid can cause pregnancy, particularly on ovulation day, is a common concern for many couples trying to conceive or avoid pregnancy. Pre-ejaculate fluid, also known as pre-cum, is produced by the Cowper's glands and is released before ejaculation. While it is primarily meant to lubricate the urethra and neutralize acidity, it can also contain sperm if there are residual sperm in the urethra from a previous ejaculation.

In your case, since the sexual activity occurred around the time of ovulation (which you indicated was around May 11-12), there is a possibility of pregnancy. Sperm can survive in the female reproductive tract for up to five days, and if ovulation occurs shortly after the sexual encounter, the sperm may fertilize the egg. Although the likelihood of pregnancy from pre-ejaculate fluid is generally lower than from ejaculate, it is not zero, especially during the fertile window.

Regarding your girlfriend's history of uterine injuries and thin endometrial lining, these factors can indeed affect fertility. A thin endometrium may not provide a suitable environment for implantation of a fertilized egg, which can lead to difficulties in conceiving. Additionally, any scarring or damage to the uterus from previous injuries can also impact fertility. It's essential for her to consult with a healthcare provider or a fertility specialist to assess her reproductive health and explore potential treatments or interventions that could improve her chances of conception.

In summary, while there is a possibility of pregnancy from pre-ejaculate fluid, especially during ovulation, the actual risk can vary. If you and your girlfriend are trying to conceive, it may be beneficial to track ovulation more closely and consider consulting a healthcare professional for personalized advice and support. If there are concerns about her reproductive health due to past injuries, a thorough evaluation by a specialist can provide clarity and potential solutions.

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