Progesterone is made in the ovaries, corpus luteum, placenta, and the adrenal glands. The main way we make progesterone on a regular basis is by ovulating during our menstrual cycles.
Key Functions of Progesterone
Progesterone, like estrogen, is an important hormone for your health. It has numerous roles in the body:
- It causes the uterine lining to stay thick and stable in the 2nd half of your menstrual cycle to allow for egg implantation
- It decreases uterine contractions
- It supports blood flow to the uterus
- It helps maintain pregnancy and low progesterone is implicated in recurrent pregnancy loss and unexplained infertility
- It increases the process of bone formation
- It supports brain cell survival
- It has anti-inflammatory properties
- It balances out i.e. opposes the effects of estrogen
- It makes cervical mucus tackier and thicker in the second half of the cycle creating a less hospitable environment for sperm (and anything else that might get in vaginally)
