Development of Human External Genitalia

Author Paul Kenyon
Androgens govern the development of human external genitalia. Exposure to androgens beginning around the eighth week of pregnancy causes undifferentiated tissue to develop in the male form. In the absence of androgens development is in the female form. This effect is independent of the genetic sex of the fetus.You can observe the effect of androgens in these animations.
Development in the absence of androgens Development in the presence of androgens

To reveal the names and information about developing structures:
Development in the absence of androgens
Development in the presence of androgens
labioscrotal foldlabioscrotal foldcloacal membraneurogenital foldurogenital fold genital tuberclelabioscrotal foldlabioscrotal foldcloacal membraneurogenital foldurogenital fold glanslabioscrotal foldlabioscrotal foldurogenital fold glansurogenital membranelabioscrotal foldlabioscrotal foldurogenital foldurogenital foldanus developing glans clitorislabia majoralabia majoraanusurethral groove labia minoralabia minora developing glans penisurethral groovefused urogenital foldsanusurogenital foldurogenital folddeveloping scrotumdeveloping scrotum glans clitorisanusurethral orifice
anusurethral orificescrotal raphescrotumscrotumglans penisglans penis Last updated 09/02/07
Copyright Dr. C.A.P. Kenyon 2000-07