Conception date vs intercourse date explained

Illustration of a woman presenting a calendar with icons to show that conception and intercourse dates can differ.

Key points Conception means fertilisation near ovulation, not the day you had sex. The fertile window spans six days and ends on ovulation day. Sperm can survive in the reproductive tract for up to five days, so sex before ovulation can lead to conception later. Implantation happens later again, most often 8–10 days after ovulation. … Read more