Just pregnant progesterone value above 20ng/ml is normal. Normal ovulation after the luteal phase female progesterone maintained at a certain level, if conception is successful, progesterone will continue to high levels, can grow to 20ng/ml or more, the normal development of the fetus needs a certain level of progesterone to support the luteum of pregnancy provides progesterone in the third trimester or so will be synthesized by the placenta of the fetus itself. Of course, the normal reference value range of each hospital testing unit varies, as well as taking into account individual differences, if there is no vaginal bleeding, abdominal pain, lumbago and other symptoms of miscarriage in early pregnancy, a slightly low level of progesterone does not need to be too worried. If the progesterone level is high, but there are still vaginal bleeding and other symptoms of pre-miscarriage, it is also necessary to consult a doctor for timely intervention.