28 days pregnant, 40 normal?

Pregnant 28 days, progesterone value is 40ng, which is normal. In one month of pregnancy, progesterone value as long as it can be greater than 25ng are normal, if lower than this value may cause threatened abortion or embryo abortion, because it belongs to luteal insufficiency performance, generally will occur vaginal bleeding or abdominal pain symptoms. As long as the current stage of fetal development normal, progesterone value growth will be faster, as long as regular to the hospital for prenatal examination can be done. Early pregnancy is embryo instability, be sure to pay attention to rest, prevent overwork, ensure adequate sleep, and prohibit sexual life in the first three months of pregnancy.