For the treatment of endogenous progesterone deficiency caused by the following diseases: 1. Dysmenorrhea 2. Endometriosis 3. Secondary amenorrhea 4. Menstrual cycle irregularities 5. Dysfunctional uterine bleeding. Premenstrual syndrome 7. Progesterone deficiency caused by threatened abortion or habitual abortion 8. Luteal insufficiency due to infertility.