You don't need to run out the second you find out that you're pregnant and replace everything in your closet with a "maternity" version. In fact, you might be able to get through your entire pregnancy only investing in a few things from maternity stores, and shopping your closet (or a size or two up at your favorite store) for the rest! What to Expect's Lifestyle Editor, Emma Bing, talks to maternity wear expert Tiffany Kariakos about the items you already have in your closet that you can wear throughout most of or your entire pregnancy. 

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