Inclusion Criteria:  Cyst diameter between 3 and 10cm Preoperative AMH level >0,5ng/ml Understanding and acceptance of the protocol  Exclusion Criteria:  Post-menopausal status Any suspicious finding of malignant ovarian disease Change of contraception method leading to AMH variation Allergy to bovine products found before inclusion Pregnancy Patient who has already participated in the protocol Person deprived of liberty by judicial or administrative decision Person protected by law, under tutorship or curatorship Patient participating in another interventional research on the human person in progress Refusal of participation after a period of reflection Patient not affiliated or beneficiary of a national health insurance system