Oh, Mary!

[Kevy Baby]

OK, here's where I will probably piss a lot of people off (unless they read past the first line):

The ideal parenting situation, with all other factors being equal, is to be raised by a man and woman in a stable, loving, married relationship.

The key part of that is "all other factors being equal."

That being said, there are a LOT of married people who should not be having children. And there are a LOT of non-traditional couples who would/do make great parents. The singulary most important thing a parent/parents can provide a child is love. Being in a male and female marriage does not automatically make one better prepared for that task.