Labioscrotal swelling

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.
"Genital swelling" redirects here. For genital swelling in primates, see Sexual swelling.
Labioscrotal swelling
Stages in the development of the external sexual organs in the male and female.
Details
Precursorgenital tubercle
Gives rise toLabia majora, Scrotum
SystemReproductive system
Identifiers
Latintuberculum labioscrotale
TEE5.7.4.0.1.0.4
Anatomical terminology

References

This article incorporates text in the public domain from page 1214 of the 20th edition of Gray's Anatomy (1918)

  1. HSC - Gonad Descent and Development of External Genitalia II
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