Image from: National Center for Biotechnology Information. PubChem Database. Progesterone, CID=5994, https://pubchem.ncbi.nlm.nih.gov/compound/Progesterone (accessed on Mar. 7, 2020).
Progesterone is a hormone that plays a role in the reproductive system (Liang et al., 2018). More specifically: menstruation; pregnancy and the development of human embryos (Liang et al., 2018). It functions as a controlling hormone for oestrogen by lowering the number of oestrogen receptors and binds to progesterone receptors (Liang et al., 2018). Its structure is shown on the left.
References: LIANG, Y., LIU, L., JIN, Z., LIANG, X., FU, Y., GU, X. & YANG, Z., 2018. The high concentration of progesterone is harmful for endometrial receptivity and decidualization. Scientific Reports.8(1), pp.712-12. Available from: 10.1038/s41598-017-18643-w.