Pregnancy pillows are designed to help women, especially those in the later stages of pregnancy, assume positions that are more conducive to sleeping soundly through the night. Most of the pillows that fall into this category are large enough for a pregnant woman to wrap her entire body around, helping align everything from head to toe. Pillows make a great gift for any pregnant woman that you know, or even work well as a gift for yourself if you have been having sleeping trouble as your stomach expands.