As someone who was until just recently dating a girl with a baby, I would do it only if A) she's REALLY cool about it and is okay with being very casual and has help with the kid so she can be a *little* bit flexible, or B) you REALLY REALLY REALLY believe this girl might be someone you can get serious with and are okay with basically becoming NuDad.
I was dating a girl with a kid until just very recently, and it was SO not worth the trouble. She'd had a million issues with the absent dad who broke her heart and refused to be involved, and was a headcase because of it. Her parents were super protective of her because they were afraid the next guy to come along would do the same thing. The baby made EVERYTHING way more complicated and it was so incredibly difficult just to get time around her. Not counting the night we first met, we only ever had ONE date without the baby present because every time we made plans, something happened and she had to bring the kid. I'm 24. I was already near marriage once, and I don't need anything serious in my life right now. I'm one of the most social, active people I know, and I *don't* need a kid dragging me down or getting in the way of my game, or a young mommy falling for me too quickly (which she was) because I just happen to be really good with children. If these are things that might run through your head too, think twice, bro--and keep movin.