35 days pregnant B ultrasound can not detect pregnancy sac how to return a responsibility, can be ec

Pregnancy 35 days B ultrasound examination does not appear gestational sac belongs to normal physiological phenomenon, general pregnancy 40 days to 50 days B ultrasound examination will appear gestational sac. It is best to wait until a week later re-examination B ultrasound and blood hcg, only to rule out the possibility of ectopic pregnancy.