Pregnancy Chances: Key Insights on Ovulation and Intercourse

Probability of Pregnancy

If ovulation occurs on February 6 and there was vaginal friction for about 30 seconds on February 4, with some wiping of the glans, followed by the use of saliva as lubrication, and then inserting the glans about 2 centimeters deep before withdrawing (with approximately 20% still outside), what is the likelihood of pregnancy in this scenario? Additionally, if intercourse occurs after ovulation, is the morning-after pill ineffective?

Niming, 20~29 year old female. Ask Date: 2023/02/05

Dr. Huang Yuande reply Obstetrics and Gynecology

1.
The probability is low, but it is advisable to avoid these risky actions, as there is still a possibility of some sperm being released before ejaculation.
2.
Emergency contraception is still effective within 48 hours after ovulation.

Reply Date: 2023/02/05

More Info

Understanding the chances of pregnancy involves several factors, including timing of ovulation, the nature of intercourse, and the use of contraceptives. Based on your description, let's break down the situation.

1. Timing of Ovulation: You mentioned that ovulation was expected on February 6. Sperm can survive in the female reproductive tract for up to five days, which means that intercourse occurring just before ovulation can lead to pregnancy. In your case, since the intercourse occurred on February 4, it falls within the fertile window, making it possible for sperm to be present when the egg is released.

2. Nature of Intercourse: You described a scenario where there was some friction and partial penetration. While the chances of pregnancy from pre-ejaculate fluid (pre-cum) are lower than from ejaculate, it is still possible for sperm to be present in pre-ejaculate. If any sperm were present, there is a chance of pregnancy, albeit reduced due to the lack of full penetration and ejaculation.

3. Emergency Contraception: You asked about the effectiveness of emergency contraception (EC) if taken after ovulation. Emergency contraceptive pills, such as Plan B, are most effective when taken within 72 hours after unprotected intercourse. However, they are designed to prevent ovulation or fertilization and are not effective if ovulation has already occurred. If ovulation has taken place, the chances of EC preventing pregnancy are significantly reduced.

4. Calculating Pregnancy Chances: Given the timing of your intercourse relative to ovulation, there is a possibility of pregnancy, but it is not guaranteed. The likelihood of conception from the scenario you described is lower than if there had been full penetration and ejaculation. However, it is important to remember that any exposure to sperm can potentially lead to pregnancy.

5. Next Steps: If you are concerned about the possibility of pregnancy, consider taking a home pregnancy test if your period is late. Additionally, if you are actively trying to avoid pregnancy, it may be beneficial to consult with a healthcare provider about more reliable contraceptive methods.

In conclusion, while there is a chance of pregnancy from the intercourse described, it is not high due to the nature of the encounter. If you have further questions or concerns about your reproductive health, it is advisable to speak with a healthcare professional who can provide personalized advice and support.

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