Which statement most accurately describes Postpartum haemorrhage?

A. Excessive bleeding after birth requiring rapid assessment and management. B. A syndrome characterised by ovulatory dysfunction, hyperandrogenism and polycystic ovarian morphology after exclusion of mimics. C. Implantation of a pregnancy outside the endometrial cavity, most often in a fallopian tube. D. Twisting of the adnexa that compromises blood flow and causes acute pelvic pain.