Chronological histomorphological studies on the dog foetal skin were performed on 21 dog foetuses (Egyptian land race) ranging from 20-260 mm CVR length. The premordia of the hair follicle started to appear at 50-60 mm CVR length. The hair follicles were dis tinguished into central and lateral primary follicles at 130mm CVR length.
The primary elements of the tubular and sebaceous glands were demonstrated in foetuses of 130 mm CVR length. At 200-220 mm CVR length, the tubular glands were differentiated into duct and secretory end-piece which showed an apocrine activity. The sebaceous glands were designed into one or two lobules on each side of both types of the hair follicles.