So, I just saw yet another reference to some 'man child' it's not important what it was, just that we have all heard of 'man child' or 'man babies' and I ask you - is there such a thing as a 'woman baby' are there 'woman children' out there?

Well, yes and no. They are never expected to grow up, in the sense that they become adults. They are all children, 'women and children', only men are expected to act like adults.