The pretreatment AMH level (as a continuous predictor alone) significantly predicted amenorrhea at 12 and 18 months (p = 0.004, AUC 0.74 and p = 0.01, AUC 0.73, respectively), whereas post‐chemo AMH (detectable vs. not) predicted amenorrhea at 12 months (p = 0.01, AUC 0.68) and at 6 months (p = 0.0001, AUC 0.82). The gene discussed is AMH; the disease is amenorrhea.