Phenotypic differentiation of the external genitalia in male and female embryos

In typical XX individuals, the genital tubercle becomes the clitoris, the genital swellings become the labia majora, and the genital folds become the labia minora. In typical XY individuals, the genital tubercle becomes the glans penis, the genital swellings fuse to become the scrotum, and the genital folds elongate and fuse to form the shaft of the penis and the penile urethra.