Passage of ova through the oviduct of the rabbit normally requires about 3 days, and is quite uniform for most mammalian species. The influence of oestrogen on the rate of ovum movement through the oviduct appears to be dose-dependent; high doses retard, while relatively low doses increase, the rate of movement (see Chang & Harper, 1966, for a detailed discussion). Progesterone has been reported to have no effect on transport rate (Black & Asdell, 1959; Greenwald, 1961) while other work indicates that it may block movement (Austin, 1949) or increase rate of movement (Wislocki & Snyder, 1933; Harper, 1964). The influence of autonomic drugs on the oviduct musculature was discussed in an earlier paper (Longley, Black & Currie, 1968). In this experiment the influence of various autonomic drugs on
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Longley et al. (1968) studied this question.
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