The article describes one of the forms of 46 XY DSD which is related to androgen peripheral actions. There are two disorders related to DSD with preserved testosterone production by the testes, which are Androgen insensitivity syndrome (AIS) and type 5α-reductase deficiency. Although the above-mentioned conditions have similar clinical manifestations, they are initiated by different pathogenetic mechanisms. AIS has X-linked recessive inheritance pattern and is presented by total or partial insensitivity of androgen receptors to male sex hormones.