If your wife agrees to say the traditional wedding vows of: "Will you obey him, and serve him, love, honor, and keep him in sickness and in health? And forsaking all others keep yourself only to him, so long as you both shall live?"
If your fiancee agrees to these wedding vows, your marriage will last. If she doesn't agree to those vows, your wedding won't last. It's simple stuff.
I got that stat from a book, sorry to blow up, but it does seem if you can hit three kids it does help and the purpose of a marriage does seem to be to have kids and will naturally fall a part if you don’t.