Abstract
In accordance with the principles of chronobiology, infradian rhythms that last longer than 24 hours are prevalent in mammals capable of breeding. The estrous cycle is well known in rodents, consisting of 4-5 days and characterized by the stages of proestrus, estrus, metaestrus and diestrus. The regulation of the secretion of pituitary gonadotrophins is the result of a complex interrelati…