Congratulations. Wife and I are on our fourth round of IVF with only two embryos so far. Our odds don't look too promising and will probably end up going the donor's eggs path. The process of having a live, healthy birth when biology refuses to cooperate is emotionally and financially draining for millions of couples. If technology like in vitro gametogenesis becomes available in the near future it will be a real miracle of science. Nothing to be worried or scared about.