... and every day, especially if you are hoping to conceive a child. That's according to this UCLA study (pdf), mentioned in this L.A. Times story, which my friend Ben forwarded to me. And since Valentine's Day always makes me think about the birds and the bees, I thought I'd pass it on. I've blogged about perfluorinated compounds (PFCs) before, but this is the first I've heard of the infertility angle.