Labioscrotal swelling

Labioscrotal swelling
Stages in the development of the external sexual organs in the male and female.
Details
Precursor	genital tubercle
Gives rise to	Labia majora, Scrotum
Identifiers
Latin	tuberculum labioscrotale
Code	TE E5.7.4.0.1.0.4
*Anatomical terminology* [edit on Wikidata]

The labioscrotal swellings (genital swellings or labioscrotal folds) are paired structures in the human embryo that represent the final stage of development of the caudal end of the external genitals before sexual differentiation. In both males and females, the two swellings merge:

In the female, they become the posterior labial commissure. The sides of the genital tubercle grow backward as the genital swellings, which ultimately form the labia majora; the tubercle itself becomes the mons pubis. In contrast, the labia minora are formed by the urogenital folds.^[1]
In the male, they become the scrotum.

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

↑ HSC - Gonad Descent and Development of External Genitalia II

External links

Development of the reproductive system

Precursors	Mesoderm intermediate lateral plate Endoderm Cloaca Urogenital sinus Ectoderm Cloacal membrane

Internal	Development of the gonads Gonadal ridge Pronephric duct Mesonephric duct Paramesonephric duct Vaginal plate Definitive urogenital sinus

External	Genital tubercle Labioscrotal swelling Primordial phallus Gubernaculum Peritoneum Processus vaginalis Canal of Nuck

See also	List of related male and female reproductive organs Prenatal development Embryogenesis

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