Hi, USG is the best means to confirm pregnancy doubts at present. If sonography succesively twice reports that there is no heart beat , I am reaily sorry to guess, this pregnancy is not viable. If you want, you can get a second opinion to clear your own doubts. The only way to tackle such cases is to terminate the pregnancy. mostly growth arrest at this stage, is due to hormonal deffisiensy. Do consult your Gynac for knowing any other possibility of cause. Don t be upset. this is not the end of the story.Take a gap of 3 months . Use the days to get good health. Get rid of the possible deficits in your health. & plan for other chance. wish you all the best for future. thank you.