(OR = 0.48; 95% CI = 0.28‐0.82), suggesting that if age, infertility duration, past live‐births, and AMH were equal in the two groups, the odds for a live‐birth after one cycle of IVF in couples with UI1 would be reduced to half when compared with couples with a known factor infertility. This evidence concerns the gene AMH and Infertility.