Whether or not to continue to keep the fetus with low progesterone depends on the overall situation of the pregnancy, which varies from person to person. If the progesterone level is below 15ng/ml, and the fetal heart cannot be monitored, it is necessary to choose abortion at this time, and not to blindly insist on fetal preservation, for the sake of eugenics. Low progesterone is mainly caused by luteal insufficiency in women, and may also cause the rejection of the maternal embryo, thus leading to miscarriage. In the early stages, progesterone can be replenished through medication under the guidance of a doctor, or you can use progesterone or progesterone injection as prescribed by your doctor.