3 x miscarriage for my wife one in 2014.

Hi doctors i will like you to just suggest me as the pain of not having child till date with me and my wife. She is 43 yrs old and i am 42yrs We are married for the 5yrs and 7 moths of marriage till march hoping God will bless us with a baby. We had gone tru 3 good time miscarriage and lead to abortion 1 in 2014 and twice last year. it was very much painful for both of us losing a child like that but we strongly believe in Our Lord Jesus Christ he has a best plan for us. As per the medical check from A-Z we have done and many doctors we had met said everything is normal and i have even sent all the report to my brother in-law across the country to preview it for me he said same thing as well. We had spent lost of money on missed abortion and i want the right answer from the best doctor on practo and i believe i am on the best site to discover the best doctor. THe question is what is the alternative for her to get pregnant is it tru IVF or normal?