What is implantation bleeding?

Implantation bleeding is a tiny bit of spotting at the time that the embryo implants into the uterus. It usually occurs approximately 7 days after conception, which is typically about 7 days before you expect to get your next period.

Implantation bleeding is not a reliable sign of pregnancy. Most women who are pregnant never have implantation bleeding. Furthermore, many women who have what appears to be implantation bleeding are not pregnant.