I'm sure we're all familiar with Heidi Murkoff's 1985 pregnancy bible. It is probably the most famous guide to pregnancy in the English-speaking world. What To Expect When You're Expecting , and others in the same series, have sold a staggering 35 million copies worldwide. With a phenomenon like this how long could Hollywood be expected to stay away? And sure enough, in line with the recent spate of films about pregnancy ( Knocked Up , Juno , Away We Go ), Heidi Murkoff's best-seller has been given the Hollywood treatment. One obvious issue is that the book is non-fiction guide to pregnancy. How does this convert into a fictional film? Well, the path has already been paved by He's Just Not That Into You , 2009?s romantic comedy about dysfunctional relationships that was adapted from the self-help book of the same name. In this instance the scenarios discussed in the book were explored through various characters' romances. What To Expect When You're Expecting adopts a very similar approach. The film follows five couples who are all awaiting the arrival of a baby. There's celebrity fitness coach and control-freak Jules (Cameron Diaz) and her more laid-back boyfriend, Evan ( Glee 's Matthew Morrison). Holly and Alex (Jennifer Lopez and Rodrigo Santoro) who are preparing to adopt a baby from abroad. Wendy (Elizabeth Banks), the author of Breast is Best children's book, and her husband Gary (Ben Falcone) who have been struggling to conceive for two years. Meanwhile Ramsey's much younger