Progesterone is too low and there is redness, whether it can be preserved or not, need to be based on the fetal condition, bleeding and other indicators to determine whether it can be successful in preserving the fetus. If the embryo itself is underdeveloped after a woman’s pregnancy, it may show up as low progesterone. If the value of progesterone is lower than 8ng/ml, the possibility of successful fetal preservation is relatively small, but it should be judged in the light of the actual situation. If the bleeding is relatively small, by taking progesterone and other supplemental progesterone, to a certain extent can be successful in preserving the fetus, but if the bleeding is relatively large, the possibility of successful preservation of the fetus is relatively small. Moreover, whether a woman can be successful in preserving the fetus needs to be judged in combination with other indicators, such as estradiol, HCG and other tests to make a comprehensive judgment, and cannot be generalized. If a woman is pregnant and has low progesterone and redness, it is recommended that she go to a regular hospital and actively preserve the fetus, and pay attention to bed rest and do not overwork.