The transformation of a phenotypically female child into a phenotypically male adult at puberty, which is reported to be celebrated in Dominican culture, is the result of a genotypic male (with XY chromosomes) born with a deficiency in the enzyme 5α-reductase. 5α-Reductase is responsible for the conversion of testosterone to dihydrotestosterone via reduction of testosterone. Dihydrotestosterone (DHT) is the hormone responsible for the majority of embryonic development of primary male sexual characteristics such as genital size.