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Studies on the physiology of reproduction in the dog. II. Observations on the time of ovulation

, : Studies on the physiology of reproduction in the dog. II. Observations on the time of ovulation. Japanese Journal of Animal Reproduction 18(4): 137-142

Laparotomies were carried out on bitches 24, 36, 48, 60, 72 or 96 h after the onset of acceptance of the male. No ovulations were observed 24 or 36 h after acceptance (4 bitches examined); ovulation was observed at 48 h in 7 out of 13 bitches, at 60 h in 11 out of 12 bitches and at 72 or 96 h in 3 bitches. It was concluded that ovulation in most bitches starts 48 h after acceptance of the male and terminates 60 h after acceptance.


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