I went for a check-up at 6 weeks and there was a fetal heartbeat. Now I am 9 weeks pregnant and I went for a check-up again and there is no fetal heartbeat. Doctor, can you tell me why there is a fetal heartbeat at 6 weeks but no fetal heartbeat at 9 weeks? Thank you, doctor.

My pregnancy is 6 weeks with a CRL of 3mm and a fetal heart rate of 110 beats per minute. The standard CRL for a 6-week pregnancy is 4 - 7mm. So, doctor, can you tell me if a 6-week pregnancy with a CRL of 3mm is a concern?

The formation of a fetal heart and normal development is a good indicator of the fetus's health. However, in many cases, ultrasound results show no fetal heart. What is the reason for this condition, and what should be done in this case?