<prompt> Most common cause of secondary PPH is -InfectionRetained products of conceptionCoagulation defectsEstrogen therapy for lactation suppression  <response>: Ans. is b i.e., Retained products of conception Secondary PPHo Bleeding usually occurs between 8th to 14th day of deliveryo Causes of late PPH : Retained bits of cotyledon or membranes M.C. Infection and separation of slough over a deep cervico - vaginal laceration. Endometritis and subinvolution of the placental site.o Management: Replacement of blood loss USG to rule out retained products of conception. Dilatation and curettage to remove retained products. Laceration with bleeding vessel - Hemostatic sutures. Secondary hemorrhage following caesarean section - Laparotomy with SOS Internal iliac artery ligation sos hysterectomy. 