[Electromicroscopy of the nerve structures in human myometrium at term (author's transl)]

The authors describe the ultrastructure of myelinated and nonmyelinated nerve fibres as seen in human myometrium at the end of pregnancy. The nerve ending looks degenerate and is found in close contact with a structure that is probably muscular. This ultrastructural appearance corresponds to the quantitative levels of noradrenaline found in the tissues at the end of pregnancy which show that the uterus becomes depleted of catecholamines.