Frequency of mating in single male rat and decrease in pregnancy rate and number of implantation sites.
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概要
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Decrease in reproductive performance in male rats by frequent mating was investigated under various male to female ratio and different diucpeion of cohabitation. Major parameters for assess-ment were incidence of pregnancy, number of implantation site in the female, and weight and histo-logy of the reproductive organs in the male.<BR>In case of one day pairmating, fertility was close to 100% and number of implantation was 14.8±1.7 (mean±sD). By replacing the female partner every day for five consecutive day, or by prolonged polygamy, the values decreased significantly.<BR>It is clear that when a single male rat was tempted to mate frequently, his reproductive perfor-mance is impaired quickly and, even in vivid sire, 4-5 days of rest is required for recovery. This admonishes that mating schedule in rats should be regulated for assessment of drug effects for repro-duction.
- 日本繁殖生物学会の論文
日本繁殖生物学会 | 論文
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