My friend's daughter had several rounds of IVF, which all failed. She was desperately unhappy. Then one of their friends had a huge family crisis, and she jumped in to help and support them. The infertility problems receded into the background. A year later she had a set of naturally conceived twins. It seems that her body didn't want to get pregnant while she was in such a stressed state.
My DD finally met 'Mr Right' when she was 40. They decided to try for a baby, but eventually found that her eggs were not of good quality. Her dear friend offered to be an egg donor, which involved a lot of 'red tape', interviews and intrusive treatments. Luckily the first implant resulted in a lovely baby. The procedure was extra-expensive, (in Australia) as three people were involved, but was worth every penny. The only sad thing is that, at 44, she won't take the risk of using the other two embryos, and they are not allowed to donate them to another IVF patient.
After having one baby, we tried for another for 3 years, before adopting a baby. 4 years later I had a natural child, then 2 more came along!
Everyone has a story to tell about infertility, but if all else fails there are so many children in care, desperate to find a loving family. I know that this doesn't appeal to everyone, but my adopted daughter is just as precious to me as my 'natural' children. It's a path that I would highly recommend.