Effect of photoperiod on gonadotrophin concentrations in domestic turkeys.


1. Circulating immunoreactive luteinising hormone (LH) and follicle stimulating hormone (FSH) concentrations have been measured during photoperiodically-induced changes in the reproductive state of turkeys. 2. In a period of sexual quiescence on short photoperiods (6L: 18D) LH concentrations were higher during the hours of darkness in both sexes. 3… (More)


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