During which phase of the menstrual cycle does the corpus luteum develop?

The corpus luteum develops during the luteal phase of the menstrual cycle. This phase occurs after ovulation, which is the release of an egg from the ovary. Following ovulation, the ruptured follicle transforms into the corpus luteum, which plays a critical role in hormone production, particularly progesterone. Progesterone prepares the uterine lining for potential implantation of a fertilized egg and helps maintain the early stages of pregnancy if conception occurs. If implantation does not happen, the corpus luteum degenerates, leading to a decrease in hormone levels, which ultimately triggers menstruation. This cycle of hormonal regulation is essential for reproductive health and is distinctly marked by the luteal phase following ovulation.