My wife coceived 3 times but suddenly it has miscariage. We had test all but thyroid has come in focus when happend second time also but period was same (2 month 2 days). Now we against thyroid test and result is normal but this time also miscourage (period is 2 months & 10 days. Why it has happenning again and again. Has she any utterous problem that she can not hold? kindly advise sir.