Well sorry to know that you had missed abortion
.But there are many causes of missed abortion after IVF and getting frozen embryo transfer
may not solely increase your abortion risks. And as such if you have frozen those embryos, you should use them because going for a fresh cycle will have pretty additional expenditure and cumbersome of additional gonadotrophin use. Going for stimulation and ovum retrieval is not without risks , i tell you.So i advice that you that you use those frozen embryos now and if failure you can go for a fresh cycle after a few months.
all the best