Then Came You by Jennifer Weiner

Jules Strauss, a senior at Princeton, is desperate to get her father the help he needs to treat his addiction, so she decides to donate her eggs to a local fertility clinic. Annie Barrow, meanwhile, has a load of debt, two young children and a husband, Frank, who is continuing his schooling so he can get a better job. Thus, she decides to be a surrogate. India Bishop and her older husband, Marcus, really would like a child of their own--although Marcus has three grown children, including his daughter, Bettina. In Then Came You, the lives of Jules, Annie, India, and Bettina intersect along the path to having a baby and all four women learn that the path can have a few bumps...