70 days without fetal heart rate, 80 days without fetal heart rate

The time of fetal heart formation is generally about 50-60 days of pregnancy, if the fertilized egg implantation time is relatively late, the time of fetal heart formation will be relatively late. 70 days has not yet appeared fetal heart, through the hcg value continues to double growth, progesterone value is also normal;80 days may appear fetal heart, if the fetus has stopped, 80 days will not appear fetal heart.