Women with low progesterone will not necessarily miscarry, low progesterone has two possibilities, as follows: 1, will miscarry: if indeed the luteal function is relatively poor, low progesterone can not maintain the continued pregnancy, there may be symptoms of pre-eclampsia, miscarriage, women may be accompanied by some irregular vaginal bleeding, some brown discharge, vague pain in the stomach, or even severe pain symptoms, there may be pre-eclampsia miscarriage or Inevitable miscarriage; 2. Not necessarily miscarriage: some women have low progesterone but no symptoms, no stomach pain, back pain, vaginal bleeding, which generally means that a slightly lower progesterone can also maintain a normal pregnancy for women, so low progesterone does not necessarily lead to miscarriage, but progesterone is too low, such as less than 10ng/mL, it is best to use progesterone to support the maintenance of pregnancy under the guidance of a doctor. If a woman has relatively high progesterone but still has some symptoms of preterm miscarriage, it is also best to take progesterone supplements under the guidance of a doctor.