What is the theme in Little Earthquakes by Jennifer Weiner?

Motherhood/Childbirth is a theme in the book. From pregnancy and childbirth, through the first year, Jennifer Weiner paints a vivid and true-to-life picture of what this exhausting, wild, frightening and wonderful time is really like. The reader will learn the truth about pregnancy and that it's very different, yet very much the same for every woman. Some women who are thin, gain very little of their own weight and end up looking almost the same but with a beach ball front. Others, who are heavy already, just look like they're fatter than ever. Some feel fine through the whole pregnancy, some are sick for just a short time, while others throw up or are exhausted the entire time.