User blog comment:SayuriDarling/The Mark of Athena Official Discussion/@comment-4649443-20121019040618

How exactly is a child of Athena born? It sounds pretty confusing, what Annabeth says. Does that mean Athena splits her head open every time she has a child? Ouch. And how does she get pregnant in the first place?

And on the subject of birth, I wonder when exactly Annabeth is born. If you talk about the year then we could say the same year Percy was born, but how about the month? Is she older or younger than Percy?