My wife is 6.5 week pregnant and no heart beats are seen yet, 2 months earlier she has gone through a miscarriage followed by a curating and heart beats were seen that time at 6.4weeks. This time we meet the Dr. at 5.1week and he call us after one week, when we visited the Dr. the size was 158mm and the week was showing 6.5 instead of 6.1week, the doc is saying you can't keep baby for 6 months after curating, so he is saying I can't say anything, please guide me.