7 weeks pregnant with fetal heart and buds but progesterone only 8ng/ml is not normal, belong to the low situation. Normal progesterone value of 7 weeks pregnant is above 25ng/ml, below 25ng/ml indicates that the value of progesterone is on the low side, checking the value of progesterone is only 8ng/ml is abnormal, although there is the development of the fetal heart and buds, but in the course of the pregnancy there is a greater chance of miscarriage with a preeclampsia. With the increase of pregnancy weeks, the value of progesterone in the body will gradually increase, progesterone can increase the vascularization of the reproductive system and tissue vasculature, promote the development of the embryo, progesterone can also reduce the uterine muscle conductivity, excitability, reduce the uterine muscle sensitivity, prevent the uterus from discharging the embryo out of the body, and play a role in preservation of the fetus. When the progesterone in the body is low, these protective effects fail, increasing the chances of vaginal bleeding and abdominal pain. If you go to the hospital at 7 weeks pregnant to check for low progesterone, you can be treated with progesterone, dydrogesterone tablets and other medications under your doctor’s guidance to see if you can successfully preserve the pregnancy.