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THE TRANSPORT OF SHEEP AND GOAT SPERMATOZOA IN THE EWE

Summary.: Counts were made of the numbers of spermatozoa in the Fallopian tubes of ewes 24 hr after mating or after insemination with either sheep or goat semen.

Spermatozoa were recovered from all five mated ewes (10/10 tubes), from all eight ewes inseminated with sheep semen (13/15 tubes) and from four of eight ewes inseminated with goat semen (7/16 tubes). The calculated mean numbers of spermatozoa per tube for the three groups were, respectively, 55,332±22,434, 2937±889 and 4640±1958. The low fertilization rate of ewes inseminated with goat semen cannot be explained by failure of the goat spermatozoa to reach the Fallopian tube.