The presence of fetal heartbeat and fetal buds but low progesterone means that the fetus is still growing and developing, but it is not stable in the uterus and there is a risk of miscarriage. Fetal buds usually appear on the 40th day of pregnancy, and fetal heart usually appears on the 50th day of pregnancy. The presence of fetal heart and fetal buds is a good sign, indicating that the fetus is in a normal state for the time being, and the safety of its life has not been affected. However, if there is low progesterone, it means that the luteinizing body of the pregnant woman is not functioning well enough to maintain the stability of the fetus, and miscarriage may occur, and exogenous progesterone needs to be given to supplement. When you find that the fetus has fetal heart and buds but your progesterone level is low, it is recommended that you go to the hospital in time, and use progesterone and other medications under the guidance of your doctor for fertility preservation treatment, to promote the normal development of the fetus.