<s>[INST] Hi,my last period was 24/10/13.got 1st beta done on 28/11/13,the value came 304,then repeated it on 4/12/13 and the value came 2141.my doc gave duphaston 2 times and folic acid once a day.the first ultrasound done on 3/12/13  showed 3.6mm gestational sac.got it done again on 9/12/13 it grew to 10mm but still no cardiac activity.please explain as to whats happening.another info I have thyroid and taking medication as well as irregular periods. [/INST] Hi and thank you so much for this query. I am so sorry to hear about this absent cardiac activity on the ultrasound. Every other finding indicates that the p[pregnancy in increasing in size and the gestational hormone tier strongly suggest this. I will suggest that you get a repeat ultrasound IIN 4 weeks to control this again. If there are no signs of a cardiac activity, then other possible causes of gestational tissue without fetal activity like molar pregnancy should be considered. Do you have exaggerated nausea and vomiting? These could be suggestive and if the liters are rising higher than expected for age, this should be strongly considered.  For now, be calm and go for a flow up control. Depending on the findings, active measures can be pursued or reassurance if the cardiac activity is clearly seen I hope you find this helpful. Thank you so much for using our services, and please feel free to request for more information or clarifications if need be. I wish you the best of health. </s>