Effect of Management of the Endometrioma on Ovarian Reserve

Inclusion Criteria: * Caucasian premenopausal women between 18-39 years with the diagnosis of endometrioma, one or more, with a diameter of up to 7 cm by endovaginal ultrasound. Body mass index comprised between 17-30 Kg/m2 Exclusion Criteria: * Previous ovarian surgery; * Previous pathologies involving the ovary, including other ovarian tumors, polycystic ovaries, or pelvic inflammatory disease; * Previous diagnosis of cancer treated with chemotherapy or local radiotherapy; * Diseases affecting the endocrine system, diabetes, thyroid, hyperprolactinemia, or the immune system (lupus, Crohn,…); * Genesic wish; * Endometrioma \>7 cm; * Unhealthy habits, including smoking, alcohol consumption above social level, or illicit drugs; * Insufficient level of autonomy for unrestrictedly signing informed consent; * Current or previous use of hormonal contraceptives, Gonadotropin-Releasing Hormone (GnRH) analogues, any drug with a known effect on endometriosis, or any drug under investigation, for what a washing up period of 6 months will be required in all cases.