Inclusion Criteria:

• Patient aged between 18 and 43 years (inclusive)
• Patient diagnosed with endometriosis (by histology or imaging) and symptomatic, requiring surgery (pelvic pain and/or infertility and/or risk to an organ)
• Pelvic MRI or ultrasound performed within the last year showing at least one endometrioma larger than 20 mm in diameter
• Patient with an intention to conceive (probable or certain) after surgery
• Patient informed and having signed the consent form
• Patient covered by a social security scheme

Exclusion Criteria:

• Intraoperative finding that the cyst is not an endometrioma
• Patient under guardianship, conservatorship, or incapable of giving consent
• Patient without sufficient understanding of the French language
• Patient under judicial protection measures
• Patient who is pregnant or breastfeeding