This is an obsession in the manosphere because they imagine that these women were impregnated and abandoned by an alpha and are now looking for a beta to take care of the kid. Everytime I see a post about this I cringe. So I want to offer my observations.

From what i have seen single mothers come in broadly two forms.

One is a woman who was married for many years and got divorced. If you end up dating in your late thirties and forties most men and women will be have been married and divorced and most will have kids. Nowadays nearly all normal middle-class people in those circumstances (at least in New England where I live) will have 50-50 custody. So for every "single mother" of this sort there will be a "single father" too. These women aren't looking for a man to take care of their kids anymore than the their ex-husbands are. Their stories have nothing to do with the alpha-beta story the manosphere obsesses over.

Then there are women who live in ghettos and trailer parks who have kids with multiple men that don't take care of them. These women are to be avoided at all cost for obvious reasons. Maybe their stories fit the manosphere narrative. I don't know but they have so little to do with normal people that they should not be shaping anyone's view of women.

There are other cases too. I have known a small handful of people who had a child at a young age by accident out of wedlock. They were normal people and their partners shared in the raising of the children. It was never a case of a woman looking for someone else to raise her child because the child's father abandoned the child. Few normal people end up in such circumstances. Few normal women choose that badly.

EDIT: I AM NOT SAYING YOU SHOULD DATE SINGLE MOMS! FFS. I am just pointing out how ridiculous and irrelevant the manosphere narrative is.