AMH and amenorrhea: 5 ml of PRP (concentration not reported) activated by calcium gluconate was injected throughout the ovaries of four women with at least one round of IVF failure or amenorrhoea for over 3 months. FSH, AMH and E2 measurements obtained pre- and post-PRP therapy. Hyperstimulation ovarian stimulation and oocyte retrieval performed from 59 days after therapy