Ovulation: Timing, Egg Release, and Pregnancy Chances - Obstetrics and Gynecology

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Understanding ovulation and the timing of egg release is crucial for couples trying to conceive. When you receive an ovulation trigger shot, such as hCG (human chorionic gonadotropin), it stimulates the ovaries to release mature eggs. Typically, this process occurs within 24 to 36 hours after the injection. In your case, since you received the shot on May 14 and had artificial insemination on May 15, you were likely in the optimal window for conception.

Regarding your question about the size of the follicles, it is important to note that not all follicles will necessarily release an egg at the same time. Generally, the largest follicle, which is usually the most mature, will be the one that ovulates. However, smaller follicles can also release eggs, but this is less common. In some cases, multiple follicles can mature and release eggs in a single cycle, leading to the possibility of fraternal twins if both are fertilized.
If you still have smaller follicles present after the trigger shot, they may not have enough time to mature and ovulate in the same cycle. However, it is possible for smaller follicles to grow and ovulate in subsequent cycles, but this would depend on your hormonal levels and ovarian response.

As for your question about having intercourse on May 27, it is important to understand the timing of ovulation. If ovulation occurred around May 15, the window for fertilization would typically be within 12 to 24 hours after ovulation. Sperm can survive in the female reproductive tract for up to five days, so if you had intercourse on May 27, it would be outside the optimal window for conception from that specific cycle. However, if you have a longer cycle or if ovulation was delayed, there might still be a chance, albeit slim.

When it comes to testing for pregnancy, it is generally recommended to wait at least one week after a missed period for the most accurate results. Home pregnancy tests are designed to detect the hormone hCG, which is produced after a fertilized egg implants into the uterine lining. This implantation typically occurs about six to ten days after ovulation, so testing too early may yield a false negative.

In summary, after receiving an ovulation trigger shot, the largest follicles are most likely to ovulate, but smaller follicles may not release eggs in that cycle. If you had intercourse on May 27, the chances of conception from that cycle are low, but it is always good to monitor your cycle and consult with your healthcare provider for personalized advice. If you suspect you might be pregnant, wait until a week after your expected period to take a home pregnancy test for the best accuracy.