Ultrastructural observations on the biogenic amines in the carotid and aortic-abdominal bodies of the human fetus

The carotid and aortic-abdominal bodies of two human fetus at fifth month of pregnancy have been studied with the light and electron microscope. A personal variation of the glutaraldehyde ammoniacal silver (GA/S) method has been used, which consists in performing the silver reaction on the ultramicrotomical sections of the tissues, first fixed by glutaraldehyde perfusion and then included in Epikote 812.