How are these women able to provide for their children?

In my town, there is a lot of poverty. I see very young women either with children or pregnant and I think to myself, “How can they afford it?” Some of the women I know in this very situation can hardly make rent. I don’t know any of them well enough to just ask how they do it. They are mostly friends of friends. My question is this: How can these young unmarried, some jobless couples afford to have children. I am seriously struggling and I don’t even have children.