Have either you or your DH been diagnosed with anything that would be causing your infertility? While I was trying naturally I opted to use Fertility Blend (my husband took the male formula and I took the female formula) for optimal reproductive health. It was much cheaper for us to go this route then through the RE and having treated cycles which we had plenty of failures with. Might be something worth looking into if you are interested.
GNC: Vitamins, Supplements, Minerals, Herbs, Sports Nutrition, Diet & Energy and more - look up Fertility Blend.