The movie is based on Heidi Murkoff 's pregnancy bible . The jokes are feeble and the conflicts never transcend sitcom material , Tom Charity says . Rival food cart chefs Rosie and Marco ( Kendrick and Crawford ) get pregnant on their first date , and do n't know if they 're ready to remake `` Knocked Up '' so soon . Comment:
The movie is based on Heidi Murkoff 's pregnancy bible . The jokes are feeble and the conflicts never transcend sitcom material , Tom Charity says . Comment: