Babychakra
As advised by Babychakra expert Dr Nikhil Datar(Gynecologist) -
Usually by 8 weeks heart beat must be seen on sonography. May be ahe should do one more sonography and reconfirm the facts. If heartbeats have not developed by 8 weeks of pregnancy, it will be termed as failed pregnancy and needs appropriate management
Garima Shukla
umm you please consult doc i lost my first child due to no heart beat when i started bleeding i consulted other doc she said its a missed abortion had you contacted me earlier i could have given you injections and support supplements. please meet other doc
Recommended Articles

Dr. Payal M
yes, wait for a week to rescan and see. a lot of times the conception is late or periods have been irregular etc, so the fetal age on sonography is plus or minus.
don't worry hopefully things will be ok.