Mark ZuckerBerg Married Priscilla Chan

Sorry for asking a question that may seem obvious to others: Why were they waiting for the IPO? Is it for financial or legal reasons, such as a Community Property State?

Did he sign a prenuptial agreement? An internet search implies he didn't. This reminds me of Tom Leykis' advice that everyone have a prenup. On the other side, some women have created companies by divorcing a business owner and taking half of the company.

How has Mark Zuckerberg protected his ownership of Facebook from his marriage? How would you?