Pregnancy Chances After Unprotected Intercourse - Obstetrics and Gynecology

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Understanding the chances of pregnancy after unprotected intercourse is a common concern for many couples. In your case, since your girlfriend's last menstrual period started on February 22 and lasted for four days, with an average cycle length of about 30 days, we can analyze the timing of your sexual activity in relation to her ovulation cycle.

Typically, ovulation occurs about 14 days before the start of the next menstrual period. For a 30-day cycle, ovulation would likely occur around day 16, which would be approximately March 9 in this case. Since you had unprotected intercourse on February 25, this date falls before her expected ovulation. Therefore, the chances of conception from that encounter are relatively low.

However, it is important to note that sperm can live inside the female reproductive tract for up to five days. This means that if your girlfriend ovulates shortly after your intercourse, there is still a possibility of pregnancy. The closer the intercourse is to the ovulation date, the higher the chances of conception. Since you mentioned that there was no ejaculation inside her, this further reduces the likelihood of pregnancy, but it does not eliminate it entirely.

In terms of risk assessment, if your girlfriend's menstrual cycle is regular and predictable, the chances of pregnancy from intercourse on February 25 are low but not impossible. If she has irregular cycles, it may be more challenging to predict ovulation accurately, which could increase the chances of pregnancy.

If your girlfriend is concerned about the possibility of pregnancy, she can take a home pregnancy test about a week after her expected period. This is usually the most reliable time to test, as it allows for enough time for the hormone hCG (human chorionic gonadotropin) to build up in her urine if she is pregnant.

In addition to understanding the chances of pregnancy, it is also essential to consider the implications of unprotected intercourse. Engaging in sexual activity without protection carries risks not only of unintended pregnancy but also of sexually transmitted infections (STIs). It is advisable to discuss contraception options with your partner to prevent unintended pregnancies in the future and to consider regular STI screenings if you are not in a monogamous relationship.

In conclusion, while the chances of pregnancy from the sexual encounter on February 25 are low, they are not zero. Monitoring her menstrual cycle and using a pregnancy test if her period is late will provide clarity. Additionally, discussing contraceptive methods can help manage future risks effectively.