Lutealivaihe
Lutealivaihe refers to the second half of the menstrual cycle in women. It begins after ovulation, when the ruptured follicle in the ovary transforms into the corpus luteum. This glandular structure then produces progesterone and estrogen. The primary role of progesterone during the luteal phase is to prepare the uterine lining, the endometrium, for potential implantation of a fertilized egg. It thickens the endometrium and makes it more receptive to pregnancy.
If fertilization and implantation occur, the corpus luteum continues to produce progesterone, supported by the hormone