The Grapes of Wrath
Well, there's only one main pregnant lady in the novel, and that's Rose of Sharon. Whenever we see signs of babies in books, we sit up straight and pay attention, because babies are usually a sign of new life, new beginnings. Babies are cool because they ensure a family will continue to exist over another generation. So it's a pretty big deal that Rose of Sharon's baby is stillborn. The promise for new life and new start is not realized. However, Rose of Sharon is able to bring life to the world by nursing a nearly starved man.