lisääntymissyklisten
Lisääntymissykli, or reproductive cycle, refers to the recurring physiological changes that occur in the reproductive system of many female animals, particularly mammals, which are controlled by hormones. This cycle prepares the female for potential conception and pregnancy. The most well-known example is the estrous cycle in mammals, often referred to as the heat cycle.
The estrous cycle typically involves several distinct phases. Follicular phase is characterized by the development of
If pregnancy does not occur, the corpus luteum regresses, leading to a drop in progesterone and estrogen