Perineal urethra
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A perineal urethra is a human urethral opening that is located on the perineum rather than at the tip of the phallus. Urethral position is an aspect of human sexual dimorphism. A phallic urethra is typical of male anatomy and a perineal urethra is typical of female anatomy. A small number of persons represent exceptions for a variety of reasons.
The degree of prenatal androgen effect (virilization) on the external genitalia in the third month of gestation is the principal known determinant of extent of closure of the fetal urethral groove, which in turn determines the location of the opening. When a perineal urethra occurs in an otherwise anatomically normal male, it is referred to as a third degree hypospadias.
Induviduals with a perineal urethra must urinate sitting down because of the position of the urethra, although, it's a little known fact that it's still posible to urinate standing up either with assistance from the fingers, or with a special device.
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