This study will aim to identify genetic, medical, dietary and environmental factors associated with the development of endometrioma and/or deep infiltrating endometriosis in order to move towards early diagnosis and implementation of potential preventative measures.

Inclusion Criteria:

• The subject is a female aged between 18 and 41 years
• The subject has undergone a laparoscopy or laparotomy for a benign gynecological indication excluding pregnancy, in the last 3 months
• The subject's surgery showed either no visible endometriosis lesions or histologically confirmed endometriosis lesions: superficial endometriosis, endometrioma or deep infiltrating endometriosis
• The subject has given a written informed consent prior to any study-related procedures

Exclusion Criteria:

• The subject is pregnant
• The subject's surgery results showed evidence of malignancy
• The subject has a mental condition rendering her unable to understand the nature, scope and possible consequences of the study, and/or with evidence of an uncooperative attitude

Women who have undergone a laparoscopy/laparatomy for a benign gynaecological indication excluding pregnancy in the last 3 months.