The term 'What to Expect When You're Expecting' is a popular book written by Heidi Murkoff and Sharon Mazel. The crossword solution for this term is BIRTH, which is a five letter word. BIRTH is the process of bringing a baby into the world, and is an important part of the pregnancy journey. The book 'What to Expect When You're Expecting' provides advice and information on what to expect during pregnancy, labor, and delivery.