Have you considered? What happens when a monogamous marriage says, "We aren't committed enough so we will have a baby to fix that"? I have never heard of this ending well. If you can't reinforce your relationship bonds without having kids, then your relationship can't be fixed, bubba. Kids put an all new stress on relationships that require strong bonds to begin with.
I've read a lot a lot a lot of relationship self-help books--not a ONE said "have a baby!". Most of the silly things said, spend time together and talk.