lisääntymisjaksojen
Reproductive cycles, also known as estrous cycles or heat cycles, are recurring physiological processes that prepare female mammals for mating and potential pregnancy. These cycles are regulated by hormones, primarily estrogen and progesterone, which are produced by the ovaries and the pituitary gland. The cycle typically consists of several distinct phases, each characterized by specific hormonal changes and physical manifestations.
The follicular phase, driven by estrogen, leads to the development of ovarian follicles, which contain the eggs.
If fertilization does not happen, the corpus luteum degenerates, leading to a drop in progesterone and estrogen