Q&A: When is the best time to conceive?
What is the average time that sperm takes to reach the egg? Also, if my period starts around the 23rd of the month and I am on a 28 to 30 day period cycle, when is the best time for me to try to conceive?
An excellent study by Wilcox looked at couple in whom a single act of intercourse led to pregnancy. They found that the peak time for conception is to have intercourse two days before ovulation or one day before or on the day of ovulation. Pregnancy was still possible when intercourse occurred three to five days before ovulation. However, there were no pregnancies when intercourse occurred more than one day after ovulation.
If you have a 28- to 30-day cycle, the most likely time for ovulation will be day 14 to 16. Therefore your “peak fertile period” could start as early as day 12 and last as late as day 16. Using an ovulation predictor test can help narrow this down. Otherwise, a reasonable approach is to have intercourse every other day throughout the estimated fertile period. In this example, day 12, day 14, and day 16.