Having a fetal heart progesterone 12nmol/L is a preeclampsia and requires prompt fertility preservation treatment. Normally in early pregnancy, the normal range of blood progesterone is 63.6~95.4nmol/L, with the increase of pregnancy time, the value of blood progesterone will be maintained at a higher level. If the value of progesterone is very low and continues to decline, it means that preeclampsia has occurred. 12nmol/L of progesterone is far below the normal range of pregnancy, and if there is a fetal heartbeat, you can choose to use intramuscular progesterone to protect the fetus. It is recommended that human chorionic gonadotropin (HCG) be checked at the same time to determine embryonic tissue activity. If it is determined that there are signs of preeclampsia occurring, it is recommended that medications such as progesterone be used under medical supervision to preserve the pregnancy.