17 Surprising Facts About Pregnancy & Childbirth

twins sleepingiStock.com/HannamariaH Pregnancy is a time when numbers matter: From a mother's due date to how many inches her belly measures to the number on the scale, a mom is constantly keeping count! But what if a mom wonders how her own personal figures stack up compared to those of other women? While there are no "right" or "wrong" ways to be pregnant, sometimes it can be helpful to understand other women's experience. 

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We all want to make sure our pregnancies are on track for a healthy delivery, but is there a way to get quantifiable information? We found expert information about what the average pregnancy looks like -- though again, every woman is different and pregnancies vary wildly from woman to woman. Here are the average numbers for how women change and grow during pregnancy -- from how much weight they gain, to the chances they'll have a boy, to even the percentages of moms who work. These numbers can help an expectant mother understand a little more about her pregnancy -- or maybe these facts provide interesting new ways to look at what a pregnant woman is experiencing. Read through our slideshow of fascinating numerical pregnancy facts to find out!

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