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Expecting Better: Why the Conventional Pregnancy Wisdom is Wrong - and What You Really Need to Know,
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Chelsea
Medical best practice is a slow process of change. Researchers might show that a certain recommendation isn't actually beneficial, but getting that research to all the OBGYNs in the US, and helping them believe it over what they were taught in school, can be difficult. Fast changes are easier if the data is really strongly suggesting a big safety difference-- for instance there was a relatively rapid shift in the 90s away from letting babies sleep face-down-- but it is harder when the results are less dire, like studies that show that bedrest isn't harmful, but it's not actually beneficial.
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