Many cases once thought to be sudden infant death syndrome are now believed to be accidents caused by unsafe sleep practices. The image above shows a crib with a teddy bear and bumper — items the American Academy of Pediatrics warns against putting in your baby's crib. iStockphoto.com hide caption

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Midwife Ana Luisa Ralston talks with Rosa Lainez (right) and Andrea Lopez about issues related to their upcoming deliveries during the Group Prenatal Care class at the Upper Cardozo Health Center in Washington. Here, Ralston demonstrates a position to assume during labor. Coburn Dukehart/NPR hide caption

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Surgical fellow Pablo Laje (left) and Dr. Scott Adzick finish prenatal surgery on Sarah White. Her fetus has spina bifida — a hole in the lower back that exposes the spinal cord. Jane Greenhalgh/NPR hide caption

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