This file combo made of book cover images provided by Vintage Books shows the "Fifty Shades of Grey" trilogy by best-selling author E L James. While it's impossible to declare a “Fifty Shades of Grey” baby boomlet, some moms and moms-to-be attribute their pregnancies to sex inspired by the erotic trilogy that went mainstream early this year.(AP Photo/Vintage Books, File)
Read the article: Moms-to-be credit 'Fifty Shades'

