It might be interesting to consider others who are involved in child-rearing as well. If the main predictor is having two parents stavly present, as opposed to

It might be interesting to consider others who are involved in child-rearing as well. If the main predictor is having two parents stavly present, as opposed to marriage, it may be worth considering other ways in which this is accomplished. For example, by friends or family. I've considered becoming a parent and one thing that strongly factors in whether it would work is whether I would be able to have that kind of support network beyond my partner, as raising a kid even as two people seems like a lot of stress: but 4 people dividing the work of 4 kids is seems much easier. Traditionally family would be around to fulfill this kind of role, but both I and my partner live far from our relatives, so we would need to lean on our friends instead, and given how hard it is to make friends as an adult these days, let alone ones close enough to help with childcare, it seems that's an option which is available to few. Perhaps fixing that problem would also help with this one.