I don't have children, but a woman already having a child is not a disqualifying thing for me at all. The bar is higher though and I would have to make sure it's absolutely worth it, since I'm signing up to a lot more up front than I would in a relationship where kids weren't a factor.

I also get why some men are averse to it, there are plenty of women who spend their time chasing after deadbeat bad boys getting pregnant and dumped, then expecting to find some kind have-it-together dude to give them a nice life. I wouldn't be interested in them either since it speaks to undesirable character traits and drama, but it's a gross generalization and obviously not all single mothers are like this.