Frequent abortion. If anybody.

Our marriage was solamnised in 2012. In sep 2014 we begotten boy baby but he expired in dec 2014 due to congenital heart disease and fallouts pentalogy. Since then my wife got 2abortion of 2months of pregnancy. The present one happened in march 17. After that We have done chromosome test of both which is normal. We have made fallopian tube test, ovulation study and pelvis ultrasound which are all normal. The pregancy gets terminated everytime in second month and reqires long time to get pregnant again. Every time by then the aborting reports shows for no cardiac activity developed in the womb. So require additional treatment / Info to prevent miscarriage frequently. After some time the age will be a factor to consider in pregnancy. And now she is under some tremendous mental stress due these happenings. So pls suggest treatment, if anybody.