Hormonal and ovarian changes in the post-ovulatory phase.

The postovulatory phase develops after ovulation and until the end of the menstrual cycle. This phase is characterized by the presence of the corpus luteum, the remains of the ovarian follicle that has ovulated and will now produce progesterone.

In the event of fertilization and embryo implantation, the corpus luteum will remain at the beginning of the pregnancy. Otherwise, the corpus luteum degenerates to corpus albicans and progesterone levels are reduced, triggering the shedding of the uterine endometrium and thus the onset of menstruation.