Genital tubercle

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Genital tubercle

Stages in the development of the external sexual organs in the male and female.
Gray's	subject #252 1213
Gives rise to	genital swelling, mons pubis, clitoris, penis
Dorlands/Elsevier	t_21/12827779

A genital tubercle is a body of tissue which forms in the ventral, caudal region of mammalian embryos of both sexes, and eventually develops into a phallus. In the human fetus the genital tubercle develops around week 4 of gestation, and by week 9 becomes recognizably either a clitoris or penis.

The genital tubercle is sensitive to dihydrotestosterone and rich in 5-alpha-reductase, so that the amount of fetal testosterone present after the second month is a major determinant of phallus size at birth.

Sexual differentiation

Swiss embryology (from UL, UB, and UF) ugenital/genitexterne01
Overview at mcgill.ca

This developmental biology article is a stub. You can help Wikipedia by expanding it.

v • d • e

Mammalian development of embryo and development of fetus (some dates are approximate - see Carnegie stages)

Week 1: Zygote - Morula - Blastula/Blastomere/Blastosphere - Archenteron/Primitive streak - Blastopore - Allantois - Trophoblast (Cytotrophoblast - Syncytiotrophoblast - Gestational sac)

Week 2: Yolk sac - Vitelline duct - Bilaminar disc

Week 3: Hensen's node - Gastrula/Gastrulation - Trilaminar embryo Branchial arch (1st) - Branchial pouch - Meckel's cartilage - Somite/Somitomere - Sclerotome - Myotome - Germ layer (Ectoderm, Endoderm, Mesoderm, Chordamesoderm, Paraxial mesoderm, Intermediate mesoderm, Lateral plate mesoderm, Splanchnopleure, Somatopleure)

Histogenesis and Organogenesis

Glands: Thyroglossal duct

Uterine support: Placenta - Umbilical cord (Umbilical artery, Umbilical vein, Wharton's jelly) - Amniotic sac (Amnion, Chorion)

Limb development: Limb bud - Apical Ectodermal Ridge/AER

Retrieved from "http://en.wikipedia.org../../../g/e/n/Genital_tubercle.html"

Categories: Developmental biology stubs | Embryology

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