Abstract
Reproductive neuroendocrine functions operate rhythmically. For example, the control mechanism for the ovulatory release of luteinizing hormone (LH) from the pituitary gland has an endogenous 24-h rhythmicity (Legan et al. 1975) and the pattern of LH and gonadal hormone secretion in intact animals is episodic (Bäckström et al. 1983, Lincoln and Short 1980). Similarly, sexual behaviour and most other behaviours are displayed rhythmically with seasonal and circadian periodicities (Rusak and Zucker 1975). The display of rhythms in sexual behaviour and in LH and gonadal hormone secretion will be considered here and the influence of gonadal hormones on the development of rhythms in reproductive behaviour will be discussed. Procedures for blood sampling, LH, androgen, oestrogen and progesterone measurements, hormone treatments and behaviour testing have been described in the original papers.KeywordsSexual BehaviourLuteinizing Hormone LevelLuteinizing Hormone SurgeLuteinizing Hormone SecretionLuteinizing Hormone ReleaseThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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