I just realized that in my previous post, I didn't answer the topic question -- do I think that Tinya having a baby was a mistake?

For all the reasons cited by others, the answer is probably yes. Not only is the "growing baby" plotline so old it should be ready for medicare, but other examples of super-heroes having kids haven't fared so well, either (Wanda and Vision's "imaginary" kids come to mind).

I do think her pregnancy was a natural development of the storyline. Even in the 31st century, accidents probably still happen. But what to do with it now? Even DnA seem unsure.