Figure 3. Different degrees of virilization according to the scale developed by Prader (15). Stage I: clitoromegaly without labial fusion Stage II: clitoromegaly and posterior labial fusion Stage III: greater degree of clitoromegaly, single perineal urogenital orifice, and almost complete labial fusion Stage IV: increasingly phallic clitoris, urethra-like urogenital sinus at base of clitoris, and complete labial fusion Stage V: penile clitoris, urethral meatus at tip of phallus, and scrotum-like labia (appear like males without palpable gonads).