Pregnancy Risks from External Ejaculation: Your Concerns Addressed - Obstetrics and Gynecology

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Is the probability of getting pregnant high?


Hello, doctor: I would like to ask about my situation.
My boyfriend, who is a virgin, has not penetrated me at all; we only engaged in external rubbing, and he ejaculated on my abdomen.
I am concerned about whether any semen might have made its way to my vaginal area, as I was wearing underwear but it was pulled down halfway.
In this case, if there was a small amount of semen left or if it came into contact with me, what is the likelihood of pregnancy? I have been very worried because I found information about virgins getting pregnant.
I kindly ask for your response.
Thank you.

HE, 20~29 year old female. Ask Date: 2014/11/04

Dr. Yang Wangjun reply Obstetrics and Gynecology


Hello: The average speed of sperm motility is about 2-3 millimeters per minute, which translates to approximately 20 centimeters per hour.
The length of the vagina is about 7 to 12 centimeters.
Sperm can survive in the acidic environment of the vagina for up to 4 hours, and with the cervical mucus and various nutrients in the cervix, they can survive for up to three days.
Theoretically, if semen is on the skin of the external genitalia, pregnancy should not be possible; however, if semen has entered the inner mucosa of the labia minora or the hymen, there is still a very small chance of pregnancy.
Thank you for your message!

Reply Date: 2014/11/04

More Info


When it comes to understanding the risks of pregnancy from external ejaculation, particularly in the context you’ve described, it’s important to clarify a few key points regarding how pregnancy can occur and the factors that influence it.

Firstly, pregnancy occurs when sperm fertilizes an egg, which typically happens during vaginal intercourse. In your case, since you mentioned that there was no penetration and only external contact, the likelihood of pregnancy is significantly reduced. However, it is not entirely impossible. Sperm can be present in pre-ejaculate fluid (pre-cum), which is released before ejaculation. This fluid can contain sperm, and if it comes into contact with the vaginal area, there is a theoretical risk of pregnancy, albeit a low one.

In your situation, you expressed concern about the possibility of sperm from ejaculation on your partner's abdomen transferring to your vaginal area, especially since you were wearing underwear but had it pulled down partially. While the risk of pregnancy from this scenario is low, it is not zero. The primary factors that would influence the risk include:
1. Amount of Sperm: The more sperm that is present, the higher the potential risk of pregnancy. However, external ejaculation typically results in a lower concentration of sperm reaching the vaginal area compared to direct ejaculation inside the vagina.

2. Timing in the Menstrual Cycle: The likelihood of becoming pregnant is also influenced by where you are in your menstrual cycle. If you are in your fertile window (which is typically around ovulation), the risk of pregnancy increases. If you are outside of this window, the chances are significantly lower.

3. Presence of Sperm in Pre-ejaculate: As mentioned, pre-ejaculate can contain sperm. If there was any contact with the vaginal area, there is a slight risk, but again, this is generally considered low.

4. Menstrual Cycle Regularity: If your menstrual cycle is regular, tracking it can help you understand your fertile days better. If you have a regular cycle, you can estimate when you are most likely to ovulate and avoid unprotected contact during that time if you are concerned about pregnancy.

Given your concerns, it’s understandable to feel anxious. Here are some recommendations:
- Consider Emergency Contraception: If you are worried about the possibility of pregnancy and this incident occurred within the timeframe for emergency contraception (typically within 72 to 120 hours after unprotected intercourse), you might consider consulting with a healthcare provider about options like Plan B.

- Pregnancy Testing: If your period is late or you experience any unusual symptoms, taking a home pregnancy test can provide clarity. These tests are generally reliable when taken after a missed period.

- Consult a Healthcare Provider: If you have ongoing concerns about your risk of pregnancy or any other reproductive health issues, it may be beneficial to speak with a healthcare provider. They can offer personalized advice and help you understand your options for contraception moving forward.

In summary, while the risk of pregnancy from external ejaculation is low, it is not impossible. Understanding your menstrual cycle, using reliable contraception, and consulting with a healthcare provider can help alleviate your concerns and provide you with the information you need to make informed decisions about your sexual health.

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