I gave my first two children eggs at about one, and have since found out that we it best to wait till they are about three. My daughter went through a period of masturbating at about 2 and I was told to take eggs out of her diet to see what happens. Stopped within the week
Even organic eggs are high in hormones. Not to scare anyone, it's a personal decision what to feed your child and when. But it does make sense it is ovulation of a chicken. I plan on waiting with this bub!
It's natural for little kids to explore their bodies and I think it's a big leap to assume that the hormones in eggs are causing something that's part of natural development. At two a child has no awareness of sexuality, and even babies will explore their bodies (with or without eggs in their diet). We have our own chickens, who are completely hormone-free (we've had them since chicks) and my DD is still naturally curious about her own body. I have never heard that there's any benefit of waiting until three (are they somehow less likely to be affected??).

I waited to introduce whites or yolks, I can't remember, with DD, but since we have no egg allergies, I'm not going to bother for #2. It seems to be one of those things that comes in and out of fashion!