When does implantation bleeding occur?

are you pregnant and bleeding?

Implantation bleeding normally occurs a week to a few days before your period would normally start. Spotting that occurs around a week after ovulation is likely implantation bleeding; whereas, spotting that occurs very close to the time that your period would normally start may not be. A normal menstrual cycle generally starts off light and then gets heavier. Spotting can sometimes be the sign of an early period. If this is the case, the spotting will pick up to heavier bleeding. If you have spotting right around the time your period would normally start, it can be more confusing.

It doesn't always happen. I never had implantation bleeding and a lot of people do not. If you are bleeding and worried, call an OB. Good luck. :)

I never had this happen.

I've never had it happen. But a fertilized egg takes about six days to reach the uterus for implantation. Then the placenta forms and starts kicking out HCG. After a few days enough HCG is in your system to be picked up by a test.