What is the theme in Plain Truth by Jodi Picoult?

One theme of this novel is found in the desire of three separate characters to protect their children. The first is Katie. Katie has a baby out of wedlock, a fact she finds difficult to deal with. In fact, Katie finds this situation so difficult that she refuses to admit to herself that she is pregnant until she goes into labor. It is during labor and the actual birth of the baby that Katie admits to herself that she is having a baby and accepts this baby in her heart.