Lemos et al. first reported that infertile patients with minimal/mild endometriosis, categorized as revised American Society for Reproductive Medicine (rASRM) classification stage I/II [18], have decreased serum AMH levels compared to those in a control group who had tubal obstruction without endometriosis (1.26 ± 0.7 ng/mL in the study group [median age, 29.5 years] vs. 2.02 ± 0.72 ng/mL in the control group [median age, 30.5 years], mean ± SD; P = 0.004) [19]. The gene discussed is AMH; the disease is endometriosis.