What is implantation?
Generally speaking, “implantation” is the term used to describe when a fertilized egg attaches to your uterine lining.
An egg can only be fertilized when sperm successfully meets with a viable egg — this egg then travels from one of your tubes toward your uterine lining, where it attaches and begins to grow. It’s called implantation because the egg literally implants in your uterus in order to turn into a fetus.
Implantation usually occurs about 6 to 10 days after conception, and although this might seem incredibly early, knowing some of the signs of implantation can help you determine when to take a pregnancy test to get the most accurate results.