Estrogen and Progesterone

Now a bit more about estrogen and progesterone, this is mentioned on each and every page about fertility. To start off with estrogen, estrogen is a group of steroid compounds, named for their importance in the menstruation cycle and functioning as the primary female hormone… Progesterone is a C-21 Steroid hormone involved in the female menstrual cycle, pregnancy and embryogenesis. Progesterone belongs to a class of hormones called progestogens and is the major naturally occurring human progestogens.