Hi doctor,my sister in law is 24th years old,she merried in dec.2011,her last period dated 23rd feb.we confirmed her preganancy by blood test ,it was positive.then we have done first US on 17th april,as per dr.it was 5wk6d,delayed about 2wk,we have done today 2nd US as per dr.there is growth but not much,no heart beat yet,what we can do?is it normal?she have hypo thyroid n she is on medicine,please guide us,we are living in Tanzania,east Africa.