Low progesterone values, if you are not pregnant, are most often considered to be due to ovulation, egg expulsion, follicular atresia, and inability to secrete sufficient progesterone due to luteal insufficiency. Or due to endocrine disorders, hypothalamic-pituitary secretion of luteinizing hormone is low. Or after pregnancy, due to luteal insufficiency in pregnancy, low progesterone values can also occur, which is insufficient to maintain the continuation of pregnancy, often leading to delayed development and growth of the gestational sac, or even leading to miscarriage and stillbirth due to cessation of fetal development, which requires active progesterone supplementation for fetal preservation treatment under the guidance of a doctor, and rechecking progesterone values after a period of time to decide whether to continue using the medication and to see the The effect of fetal preservation treatment.