Implantation symptoms , like abdominal pain and vaginal bleeding, are signs that a fertilized egg has attached to a woman's uterine wall. They can happen about 3 days after conception, along with other symptoms . Symptoms of implantation tend to be very subtle, and some women may not even notice them, even if they are actively monitoring for signs of pregnancy. Even so, the first sign that you should be aware of is the appearance of pink discharge in scant quantities, which is a sign of ... Implantation is a crucial part of early pregnancy. Here, learn how and when it happens, what symptoms it can cause, and when to take a pregnancy test. If you are familiar with the common signs of implantation and how the process of implantation occurs, you will understand your own fertility cycle.