Labioscrotal swelling

{{Short description|Embryonic structure of the reproductive system}}

{{redirect|Genital swelling|genital swelling in primates|Sexual swelling}}

{{Infobox embryology

| Name = Labioscrotal swelling

| Latin = tuberculum labioscrotale

| Image = Human genitalia - development 1.png

| Caption = Stages in the development of the external sexual organs in the male and female.

| Image2 =

| Caption2 =

| System = Reproductive system

| CarnegieStage =

| Precursor = Genital tubercle

| GivesRiseTo = Labia majora, scrotum

}}

The labioscrotal swellings (genital swellings or labioscrotal folds) are paired structures in the mammalian embryo that represent the final stage of development of the caudal end of the external genitals before sexual differentiation. In humans, 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 the male, they become the scrotum.