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THE EFFECTS OF BREEDING STIMULI ON THE RATE OF SPERM TRANSPORT IN RABBITS

Sperm transport through the female reproductive tract in mammals has been studied by several investigators. The results from these studies have shown that in the mouse (Lewis & Wright, 1935), the rat (Blandau & Money, 1944), the hamster (Yamanaka & Soderwall, 1960), the cow (VanDemark & Hays, 1951; Hays & VanDemark, 1952), and the ewe (Mattner & Braden, 1963), spermatozoa are present in the oviducts within minutes of mating or insemination. A rapid transport of spermatozoa to the rabbit oviduct has not previously been reported. The interval between mating and the finding of spermatozoa in the oviducts has ranged from 1 hr (Chang, 1952) to 3 to 4 hr (Braden, 1953) and, for sufficient spermatozoa to fertilize all of the eggs, to as much as 5 to 6 hr (Adams, 1956;