This mostly laugh-free pregnancy comedy, adapted from Heidi Murkoff’s pop-parenting best-seller, is at least a slight step up from director Kirk Jones’s last effort, the awful Robert De Niro vehicle Everybody’s Fine (2009). Diaz plays one of five foxy ladies who find themselves with a child on the way. Their significant others react to the news with everything from glassy-eyed shock to ‘it’s all good’ shrugs; most of what hilarity there is comes from the gents’ befuddlement with impending fatherhood. The rest of this piffle, which follows each of the couples from conception to delivery, milks the worst kind of newborn-fawning sentiment.