Implantation bleeding — typically defined as a small amount of light spotting or bleeding that occurs about 10 to 14 days after conception — is normal. Implantation bleeding is thought to happen when the fertilized egg attaches to the lining of the uterus.

What week of pregnancy does implantation bleeding start?

Symptoms at 4 weeks pregnant

Approximately 6-12 days following conception, some people experience mild vaginal spotting with or without mild cramping. This is referred to as implantation bleeding and may be mistaken for a menstrual period. Generally, this bleeding will resolve on its own.

How do I know if Im implantation bleeding?

There are other differences that can help you determine whether you are experiencing implantation bleeding or your period: implantation bleeding is most likely to be light pink or brown (as opposed to the bright or dark red of your period) implantation bleeding is more like spotting than an actual flow of blood.