There are two reasons for the decline in progesterone: first, it is the poor development of the embryo, including early pregnancy aura miscarriage or ectopic pregnancy, resulting in a decline in progesterone, even if you take dextroprogesterone it is impossible to raise progesterone; second, it is a normal phenomenon, because progesterone belongs to the pulsatile radiation, if progesterone is very low in the trough shows that it is very low, even if you take dextroprogesterone or progesterone, it is impossible to make up for the progesterone. Sometimes in the clinical blood test progesterone value does not have much significance, especially in early pregnancy without any symptoms such as vaginal bleeding, the test progesterone is not meaningful, but if there are symptoms of vaginal bleeding in early pregnancy and the value of progesterone is not low, do not advocate excessive use of progesterone or dexedrine to protect the fetus, only in the case of recurrent miscarriages or luteal insufficiency, the need to supplement the dexedrine.