About this condition
Endometriosis — Genetic Risk
Endometriosis is a chronic inflammatory condition in which endometrial-like tissue grows outside the uterus — on the peritoneum, ovaries, bowel, bladder, and occasionally at distant sites. It affects approximately 190 million women worldwide (~10% of reproductive-age women), causing chronic pelvic pain, dysmenorrhea, dyspareunia, and infertility. Despite its prevalence, endometriosis has an average diagnostic delay of 7-10 years from symptom onset — one of the longest diagnostic delays of any common condition — because symptoms overlap with many other conditions and definitive diagnosis historically required laparoscopic surgery.
Endometriosis has strong genetic underpinnings — approximately 50% heritability based on twin studies, with first-degree relatives of affected women having 7-10x increased risk. Genome-wide association studies have identified >40 risk loci, including WNT4 (a key regulator of female reproductive tract development), GREB1 (a growth regulator involved in estrogen signaling), CDKN2B-AS1 (cell cycle regulation, also associated with endometrial cancer risk), ESR1/ESR2 (estrogen receptors), VEZT (cell adhesion), and FN1 (fibronectin — extracellular matrix remodeling). Polygenic risk scores combining these variants can identify women at 2-4x elevated relative risk.
While endometriosis is polygenic (no single gene is causative), genetic risk profiling has important clinical utility. In a woman presenting with chronic pelvic pain and infertility, elevated genetic risk for endometriosis can support clinical suspicion and accelerate referral for specialist evaluation — potentially reducing the devastating 7-10 year diagnostic delay. Additionally, emerging evidence suggests that genetic subtypes of endometriosis may respond differently to hormonal therapies (GnRH agonists, aromatase inhibitors, progestins) and surgical approaches — early steps toward genetically informed endometriosis treatment.
First-degree relatives of women with endometriosis have 7-10x increased risk. If you have a mother or sister with endometriosis and experience chronic pelvic pain, genetic and clinical evaluation should not wait for the typical 7-10 year diagnostic delay.
- Gene locus
- WNT4 (1p36.12), GREB1 (2p25.1), CDKN2B-AS1 (9p21.3), ESR1 (6q25.1-q25.2), VEZT (12q22), FN1 (2q35)
