Progesterone is a hormone produced mainly by the ovaries in females, particularly after ovulation. It plays a crucial role in regulating the menstrual cycle and preparing the uterus for a potential pregnancy. If fertilization occurs, progesterone helps maintain the uterine lining, supporting the developing embryo. In addition to its reproductive functions, progesterone also influences other bodily processes, including mood regulation and bone health. It is sometimes used in hormone replacement therapy and to treat various medical conditions, such as irregular menstrual cycles and certain types of infertility.