The Back-up Plan (2010)

Zoe is a woman who has a hard time letting anyone into her life. She has a habit of pushing people away whenever they get close. She wants to have a baby but because she has no man in her life, she decides to be artificially inseminated. Shortly after having the procedure she meets a guy named Stan, and she feels a spark. When she tells him about her pregnancy, she thinks he'll bail but he sticks with her.