<s>[INST] apparently im 7 weeks pregnant i went to get an ultrasound on Wednesday and they couldn t hear a heart beat do i still have a chance for this baby to be alive and i have a curiosity because i thought i was about 8 weeks and in the sonogram came out i was 7 weeks. [/INST] Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. If we go by the guidelines, fetal heart beat can be identified around 6 weeks. But sometimes if the baby's growth is slow, then we can identify the  heart beat by 8 weeks. So, there are chances that heart beat can be identified by 8 weeks. Hope for the best! Hope I have answered your query. Let me know if I can assist you further. </s>