In the human fetus of 14 weeks, ganglia on either sides of the Müllerian utero-vaginal canal contained two types of cells. In the 16th week, axons invaded the basal zone of the stratified squamous epithelium at the sides of the upper vagina. In the 20th week, vesicular nuclei typified the large neurons in the midportion of the cervico-vaginal ganglion. During the 22nd week, capsulated ganglia invaded the wall of the upper vagina forming three concentrically disposed strata. Non-capsulated clusters invaded its lamina propria. At the 24th week, axons were shaded after reaching the superficial zone of the stratified vaginal epithelium. In the 28th week, satellites surrounded the mature neurons and sheath cells enveloped the axons. Ganglia invaded the splitted muscle layer of the upper vagina at 30 weeks. Intraepithelial fibres invaded the whole thickness of the endometrium, the columnar epithelium of the cervix and uterine tube at 40 weeks. Nerve cells were detected among the basal epithelial cells of the lower vagina and its subepithelial plexus.

Keywords:
Innervation, Uterus, Cervix, Vagina
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© 1978 S. Karger AG, Basel
1978
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