I discovered a correlation between IF and Vit. D levels (in mice) and giving them high doses restore fertility to some. The theory is the same may be happening with humans. Many in the Pac NW and elsewhere have very low Vit D levels, in fact they're going to change the RDA from 400IU to 2000IU. My levels were very low in spite the fact that I was taking prenatals that had Vit D in them. So I'm on a Vit D protocol, 4000-6000IU/day for 2 months, then will retest. So I suggest that you ladies get your Vit. D tested to see if that may be contributing to your difficulty in ttc...
Here's a link to one of the articles.
http://ajpendo.physiology.org/cgi/content/abstract/256/4/E483 Jazzedlady
44
FSH 107 (highest)
DS Nathaniel 2 1/2, conceived w/ADI and FSH of 45