I've been reading some of your posts about fertility and remember that it was just a year ago that I had been trying futilely to get pregnant. After 6 months of trying, and simultaneously taking prescription antihistamines, I finally got pregnant when I stopped taking them.
My ob knew we were trying to get pregnant. My first born was conceived by just wishing it. So, we couldn't figure out why we couldn't get pregnant easily the second time.
In the meantime, I had debilitating sinus problems. I would literally ask my husband to come home from work b/c I couldn't "mother" in such pain. So, I kept taking the antihistamines.
About 6 months into this, I also toyed with the idea of going organic with our food. I was a big milk drinker and that was the first thing I switched. Within 2 days!!! I was completely sinus-free. So, I dropped the antihistamines. My peak fertility period was the next week and Voila! I was pregnant.
When I asked my ob about this, he confirmed that yes, just like antihistamines dry up the fluids in your head, they dry up ALL your bodily fluids. Basically, the sperm can't travel.
How about that? I guess it's a little known secret that antihistamines can indeed prevent fertility. Maybe this will help some of you mommas.