Genital tubercle
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| Genital tubercle | ||
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| Stages in the development of the external sexual organs in the male and female. | ||
| Gray's | subject #252 1213 | |
| Precursor | somatopleure[1] | |
| Gives rise to | genital swelling, mons pubis, clitoris, penis | |
| Dorlands/Elsevier | t_21/12827779 | |
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A genital tubercle is a body of tissue present in the development of the urinary and reproductive organs. It 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.
Even after the phallus is developed, the term genital tubercle remains, but only as the terminal end of it[1], which develops into either the glans penis or the glans clitoridis.
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.
See also
References
External links
- Swiss embryology (from UL, UB, and UF) ugenital/genitexterne01
- Overview at mcgill.ca
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
