If you aren't 100% sure about and ready for children, don't have them. The children are always the ones who suffer if you aren't prepared for parenthood. Consider that maybe your infertility is a sign to look elsewhere for fulfillment. If you're dead set on having children, put the money you would otherwise spend on IVF towards adopting or fostering a child. There are lots of children already in need of parents. If you're willing to put their interests before your own notions about "biological children," then that's a good sign that you are ready for parenthood.