How heavy is breakthrough bleeding in pregnancy?

Answer 1

It's similar to a menstrual period...perhaps somewhat lighter, and shorter in duration than menses. It can happen around the times when your period would be do, were you not pregnant--so it can occur at weeks 4, 8, and 12. Usually it resolves by week 12. I'm going through this myself!! I had a small bleed at 4 weeks, then a more pronounced one at 8 weeks...I thought I was going to lose the baby...but it turned out to be breakthrough, or decidual bleeding, and it's no problem for mom or baby. Just annoying.