Progesterone is an estrogen, which can be used to supplement estrogen deficiency. Progesterone capsules are generally used for the treatment of preterm or habitual miscarriage to preserve the pregnancy. Progesterone can also be used to supplement estrogen due to insufficient luteinizing function to avoid bleeding caused by insufficient progesterone function. Progesterone softgels help to promote the growth of the endometrium to facilitate menstruation, for example, progesterone softgels can be taken orally to promote menstruation if menstruation is delayed for a long time. Progesterone can also be used to treat PMS, as PMS may cause breast pain, headache and abdominal pain, which can be relieved by taking progesterone capsules. However, progesterone capsules can also have certain side effects and may cause dizziness, nausea, vomiting and other symptoms, so it is recommended to take the correct medication under the guidance of a doctor.