I was going to post something along the same lines... that there is much risk with pressuring someone who is unwilling, to make such a move, no matter which of the pair is reluctant. The marriage may certainly not survive such a pressured decision. And the marriage may not survive disagreement over such a fundamental life decision. There is risk either way, the only difference is the number of people affected by the divorce.
My friend who just had her baby never said she wanted to be a mother until she married a man who wanted children. Even pregnant, she never said it. I'd say, "Are you happy about this?" she'd say "Tim is". Time will tell how well this goes.
My former boss got divorced over this. He wanted children, she didn't. I don't know if this was discussed prior to their marriage, but it's entirely possible that one of them changed their mind later.
Ah yes. We also can't forget the "A baby will make our marriage better!" people. If your marriage was bad before a baby, then it's going to suck worse after a baby.