User blog comment:SayuriDarling/The Mark of Athena Official Discussion/@comment-69.171.187.79-20130408051732/@comment-3146930-20130417100910

It is very unlikely. Athena can do that kind of stuff because she is a goddess and the way she has children is a reflection of how she was born. Her children however are mostly human (I mean yes they say demigods are half god, but in reality they are mostly just powerful humans), meaning that if you tried to open Annabeth's head to pull a baby out, she most likely wouldn't survive the process.