Thanks for the query.
The possible causes for failure of IVF are :
- Decreased ovarian reserve
-Difficulty in doing the procedure.
--Defective embryo etc.
For more details : http://srsree.blogspot.com/2012/06/possible-causes-of-ivf-failure-and.html
IVF procedure also will not give 100 % success rate as we know.
So you may give some gap and again try for IVF.
If not you can try procedures like IVF with donor egg etc.