[5] The film follows a woman who aims to be a single mother through planned pregnancy, but soon falls in love with a man who wants to father her unborn children.

Overwhelmed, Stan goes to a children's playing area to figure out what it means to be a father, but is suspected to be a pervert; this is soon cleared up.

At her grandmother's wedding, Zoe's water breaks and on the way to the hospital they make a pit stop at the market.

The film, originally titled Plan B, was written by Kate Angelo and produced by Todd Black, Jason Blumenthal and Steve Tisch.

[8][9] Digital Spy announced in February 2009 that Alan Poul was in "final talks" to direct Plan B, which would be his first feature film.

The Back-up Plan earned $4,257,676 in 3,280 theaters on its Friday debut, reaching number one at the box office.

The website's consensus reads: "Jennifer Lopez is as appealing as ever, but The Back-up Plan smothers its star with unrelatable characters and a predictable plot.

"[25] Metacritic, which uses a weighted average, assigned the film a score of 34 out of 100, based on 32 critics, indicating "generally unfavorable" reviews.

[26] Kirk Honeycutt of The Hollywood Reporter gave the film a positive review saying, "A winning performance by Jennifer Lopez overcomes a formulaic and predictable rom-com that involves a planned pregnancy.

[28] Amy Biancolli of the San Francisco Chronicle praised the cast in her review writing "Lopez does a fine job mortifying herself in pursuit of physical humor, shifting her center of gravity in more ways than one.

O'Loughlin, in the blander role, acts hurt or shocked or besotted where required, but the supporting players nearly steal the show.