Optimal conception time for ovarian follicles

The best chance of conception occurs within 24 hours after ovulation, as the egg is most viable during this period. If sperm are present at this time, fertilization is more likely to occur.

Fertility remains relatively high within 24 hours after ovulation. For those trying to conceive, it's not advisable to wait until after ovulation to have intercourse. After being released, an egg can survive in the fallopian tube for 1–2 days, awaiting fertilization. However, since the exact timing of ovulation is difficult to pinpoint, waiting until after ovulation often means sperm may not reach the egg in time before the egg degenerates. In contrast, sperm can survive in the female reproductive tract for 2–3 days while maintaining their fertilizing ability. Therefore, it's recommended to start having intercourse 3 days before ovulation and continue every other day, allowing sperm to be present and ready when the egg is released. Clinically, the 10-day window consisting of the 4 days before ovulation, the day of ovulation, and the 5 days after ovulation is collectively referred to as the "fertile window," during which intercourse significantly increases the likelihood of pregnancy.

For women trying to conceive, once ovulation is confirmed via transvaginal ultrasound monitoring, it's important to schedule intercourse as soon as possible. It is generally advised to have intercourse twice during this period to maximize the chances of pregnancy.