2,084. Seeing Blood After the Seven Clean Days

Hilchos Issurei Biah 7:7

If a woman who gives birth as a zavah doesn’t stop bleeding, then pure blood doesn’t apply to her. Rather, any bleeding is considered as zavah blood. However, if she counted seven clean days, completed the 14 impure days following giving birth to a girl, and immersed in a mikvah, then pure blood does apply to her if she sees bleeding during the 40 days that follow giving birth to a boy or the 80 days that follow giving birth to a girl.

Hilchos Issurei Biah 7:8

If the woman counted seven clean days but didn’t immerse right away and she subsequently saw blood, she may still immerse and is permitted to her husband immediately. This is because all the days of purity are not a fit time for niddah or zivah. Nevertheless, the blood is impure and it renders others impure like niddah blood does until she immerses.