Pregnancy Chances After Unprotected and Protected Intercourse - Obstetrics and Gynecology

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Probability of Pregnancy


Hello doctor, my boyfriend and I had sexual intercourse on March 2nd, during which he wore a condom and withdrew before ejaculation.
We also engaged in sexual activity on March 4th, but there was no penetration, only foreplay.
However, I suspect that some semen may have dripped onto the bed, and I happened to sit down right after.
What is the likelihood of pregnancy in this situation? My ovulation day was March 1st.
Thank you for your response.

Wen, 20~29 year old female. Ask Date: 2023/03/04

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, the probability should be low.
Wishing you good health.

Reply Date: 2023/03/04

More Info


When assessing the chances of pregnancy after both protected and unprotected intercourse, it's essential to consider several factors, including the timing of the menstrual cycle, the effectiveness of the contraceptive methods used, and the nature of the sexual activities involved.

In your case, you mentioned two instances of sexual activity: the first on March 2, where you used a condom and withdrew before ejaculation, and the second on March 4, which involved only external stimulation without penetration. The fact that you used a condom during the first encounter significantly reduces the likelihood of pregnancy, as condoms are designed to prevent sperm from entering the vagina. When used correctly, condoms have a failure rate of about 2% with perfect use and about 18% with typical use, which accounts for human error.

The second encounter, where there was no penetration and only external stimulation, further decreases the risk of pregnancy. However, you expressed concern about the possibility of semen coming into contact with your vaginal area after it dripped onto the bed and you subsequently sat down. While it is theoretically possible for sperm to travel from a surface to the vaginal area, the likelihood of this resulting in pregnancy is extremely low, especially if there was no direct ejaculation or penetration involved.

It's also important to note that you mentioned your ovulation date was March 1. If you had intercourse on March 2, it would be just after your ovulation period, which typically lasts about 12 to 24 hours. Sperm can survive in the female reproductive tract for up to five days, but the chances of conception decrease significantly after ovulation has occurred. Given that your activities on March 4 did not involve penetration or ejaculation, the risk of pregnancy remains minimal.

In summary, based on the information provided, the chances of pregnancy from the described encounters appear to be low. However, if your menstrual period is late or you experience any unusual symptoms, it would be prudent to take a home pregnancy test or consult with a healthcare provider for further evaluation. Additionally, if you are concerned about pregnancy or wish to avoid it in the future, consider discussing more reliable contraceptive methods with your healthcare provider, as they can provide personalized advice based on your health history and lifestyle.

In conclusion, while the risk of pregnancy in your situation seems low, it's always wise to stay informed about reproductive health and contraceptive options. If you have further questions or concerns, don't hesitate to reach out to a healthcare professional for guidance.

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