At eight weeks, the internal genitalia will begin to form.

Without this anti-Müllerian hormone, the Müllerian ducts develop into the female internal genitalia (uterus, cervix, fallopian tubes, and upper vaginal barrel).

The internal genitalia are all the accessory glands and ducts that connect the gonads to the outside environment.

The internal genitalia consist of two accessory ducts: Wolffian (male) and Mullerian (female).

The testes begin to secrete three hormones that influence the male internal and external genitalia.

During "the quick and violent mating," the male literally explodes his internal genitalia into the genital chamber of the queen and quickly dies.

They are as devoid of external or internal genitalia as a child's flowfoam doll.