This is vaginal bleeding between 48 hours and 6 weeks after delivery, usually between 6–14 days, and typically on the 10th day. It is usually due to infection, particularly in association with: (1) Retained pieces of placenta. (2) Obstructed labour, causing necrosis of the cervix and vaginal wall. (3) Caesarean section and breakdown of the the uterine wound (22.14).