Hello, It is too early to predict the accuracy of a certain heart rate as at this stage of pregnancy, it is the heart beat and not the rate that matters. Serial serum beta-hCG titres concurrent with repeat sonograms should be done to exclude a co- existing molar pregnancy. Fetal DNA sampling may be done or an anomaly and NT scan may be performed to rule out Down s syndrome. Folates should be taken in dietary form as well as nutritional supplements. Hope you find this information helpful. Take care.