In Instant Mom, Nia Vardalos, writer and star of My Big Fat Greek Wedding, tells her hilarious and poignant road-to-parenting story that eventually leads to her daughter and prompts her to become a major advocate for adoption.

Moments after Nia Vardalos finds out she has been nominated for an Oscar for the screenplay for My Big Fat Greek Wedding, she is alone and en route to a fertility clinic, trying yet again for a chance at motherhood.

Vardalos chronicles her attempts to have a baby, and how she tries everything--from drinking jugs of...