A hormone
manufactured by the
adrenal glands in men and women. In women,
progesterone is also produced in the ovaries after
ovulation and in the placenta during
pregnancy.
Progesterone is responsible for many functions throughout the body and is also used by the body to
produce other
hormones.
Progesterone imbalance during the menstrual cycle can cause *ahem* interesting behavior. Or so I'm told.