That's the million dollar question. If someone has a child at 17 you may assume immaturity, but I necessarily wouldn't. Shit happens. She's also 20, which is another factor to consider. The woman I saw with a child was 24, had a 2 year old, had her own place and was employed. Not likely this girl we're talking about now falls into that category, but who knows. If the guy isn't looking to get married at his young age, I don't see why it would be a big deal. The only thing that would concern me if the father of the child was a prick still in the girl's life and was going to make this guy's life miserable. Good luck.