The corpus luteum (CL) is formed from the remaining follicle once the egg cell has been released during ovulation. It becomes a dynamic gland that produces hormones such as progesterone, which has an impact on the uterine lining and prepares the uterus for the implantation of a fertilized egg cell. If there is no implantation of a fertilized egg, the corpus luteum shrinks again, and progesterone levels fall until the next cycle.
- Baerwald A.R et al. Form and function of the corpus luteum during the human menstrual cycle. Ultrasound Obstet Gynecol. Ultrasound Obstet Gynecol. 2005 May; 25(5): 498–507. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2882116/
- Healthline. How Does the Corpus Luteum Affect Fertility? https://www.healthline.com/health/womens-health/corpus-luteum (accessed 31. July 2020)