Chaste tree has been used to treat menstrual cycle problems and pain, premenstrual syndrome, and menopause. Chaste tree berries may help stimulate progesterone. This is a female hormone that rises 2 weeks before menstruation. It may help normalize estrogen and progesterone. For over 2500 years, the chaste tree has been used for women's health, fertility and marriage rituals. The chaste tree is associated with the Greek goddesses Hera, the protectress of the home, marriage and fidelity, and Demeter, the goddess of the harvest, fertility and the sacrament of marriage.