it is possible that gokus's mom is fasha but i'm not sure becouse thedb series never says who goku's mom is and like i said it might be fasha but i'm not sure because when she sees goku she doesn't say "goku my son" she says "so  your bardock's son" so i don't know who in the world goku's mom is , but i'll try to find out. here are some pics of fasha

this might be goku's mom this is fasha