Can Friction Alone Cause Pregnancy? the Risks

Can I get pregnant?

Hello, Dr.
Tsao.
I would like to inquire: Yesterday, on July 24th, I was grinding against my girlfriend while wearing underwear and cotton pants (which became slightly damp due to some bodily fluids).
My girlfriend was wearing thinner underwear (which also had some bodily fluids).
During this, I also made some upward thrusts (without penetration, and I was wearing underwear and pants while she was also wearing underwear, only grinding and thrusting a few times near the vaginal opening).
Could this lead to pregnancy?

Bo En, 20~29 year old female. Ask Date: 2024/07/25

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, it is generally unlikely to become pregnant.
Wishing you good health.

Reply Date: 2024/07/25

More Info

Friction alone is generally not considered a reliable method for causing pregnancy, but it is important to understand the nuances involved in sexual activity and the potential risks associated with it. In your scenario, where both partners are wearing clothing and there is no direct penetration, the likelihood of pregnancy occurring is significantly reduced. However, there are a few factors to consider.

1. Pre-ejaculatory Fluid: During sexual arousal, males can release a fluid known as pre-ejaculatory fluid (or pre-cum). This fluid can contain sperm, although typically in lower concentrations than ejaculate. If this fluid comes into contact with the vaginal area, there is a potential risk for sperm to enter the vagina, especially if there is any friction that could facilitate this transfer.

2. Clothing Barrier: The presence of clothing, such as underwear and pants, acts as a barrier that can significantly reduce the chances of sperm reaching the vaginal canal. However, if the clothing becomes wet with bodily fluids, there is a slight chance that sperm could be transferred through the fabric. This risk is generally considered low, especially if there is no direct contact with the vaginal opening.

3. Ovulation Timing: The likelihood of pregnancy also depends on the timing of the menstrual cycle. If your girlfriend is in her fertile window (typically around ovulation), the chances of pregnancy from any sperm exposure, even from indirect contact, could be higher. Conversely, if she is not in her fertile window, the chances are significantly lower.

4. Sperm Viability: Sperm can survive outside the body for a limited time, but they typically do not survive long on dry surfaces or through clothing. The environment in the vagina is necessary for sperm to survive and potentially fertilize an egg.

5. Risk of STIs: While the concern here is primarily about pregnancy, it is also important to consider the risk of sexually transmitted infections (STIs). Engaging in any form of sexual activity, even without penetration, can carry risks if one partner is infected.

In conclusion, while the scenario you described presents a low risk for pregnancy, it is not entirely without possibility. If you or your girlfriend are concerned about the risk of pregnancy or STIs, it is advisable to consult with a healthcare professional for personalized advice and consider using reliable contraceptive methods in the future to prevent unintended pregnancies. Additionally, if there are any concerns about potential pregnancy, taking a home pregnancy test after a missed period can provide clarity.

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