 The medication was previously available in the United States, but it has been discontinued in this country.Dydrogesterone has proven effective in a variety of conditions associated with progesterone deficiency, Infertility due to luteal insufficiency including threatened miscarriage, habitual or recurrent miscarriage, Menstrual disorders premenstrual syndrome, and endometriosis.Dydrogesterone has also been registered as a component of menopausal hormone therapy to counteract the effects of unopposed estrogen on the endometrium in women with an intact uterus.