Mórocz et al. [20] found no single association between AIS and BMP4 (rs4898820, located in 5′ upstream of the gene) in the study of Hungarian population but investigated the interaction between the BMP4 (rs7799039) and the MMP3 (rs3025058) functional genetic polymorphisms and concluded the ORs of the GG-5A/5A, GG-5A/6A, TT-6A/6A, GT-5A/5A, GT-5A/6A, and GT-6A/6A showed significantly elevated ORs (OR from 5.89 to 7.8). Here, BMP4 is linked to androgen insensitivity syndrome.