I was told by my naturopath in no uncertain terms that more than a cup of green tea a day is out when TTC. And yes it's because it inhibits the absorption of folic acid. As with everything, if you have it in moderation you should be fine, but having it more than you normally would is not advised. I didn't even drink the iced tea version when TTC. I know the info available is contradictatory, but while it may boost fertility, it blocks folic acid, so I reckon the benefit may cancel itself out.