It is common that postnatal blood lasts for 40 days, but if it ends before the 40 days, is it permissible for such woman to perform different acts of worship? Is it also lawful for her husband to have sexual intercourse with her then?

Once postpartum bleeding ceases and she is certain that it won`t happen again, she becomes pure, and so she should perform Ghusl (ritual bath), pray, and fast. She can also have sex with her husband even before the end of (40) days because the minimum of postpartum bleeding is a moment, and the maximum is (60) days. However, the postpartum bleeding for the majority of women is (40) days, but this does not apply to rest of them.