It's a hand with the thumb between the first two fingers. When we went to Copan for our honeymoon, we were given a tour of some ruins in the countryside. In the middle of the forest was this huge stone frog, which they told me women used to come and have their babies. I was told to sit on it because it gives you good luck. I have a picture of myself sitting on this thing.
Pink jasper is a fertility stone.
Also angels by your bed are supposed to help. Actually, I think I have a bad luck charm. Before the move I bought a verde gris cast iron cricket for our hearth. A cricket on your hearth is supposed to bring good luck. To keep it short, the last year and a half has brought us nothing but trouble.