When do mallard duck started to lay eggs?

according to my study of mallard ducks this is impossible because mallard ducks are all BOYS! By ID1281088566

Ignore ID1281088566, he doesn't know what he's talking about. One of my mallard hens started laying at about 6 months old, in October. They usually don't lay until spring, and I'm sure this hen won't actually hatch a brood until then.