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During a fetal ultrasound, your health care provider rubs a small device called a transducer across your belly or inserts a probe into your vagina. High-frequency sound waves are translated into a pattern of light and dark areas — creating an image of your baby on a monitor.
In this slide, you see a baby's profile at 11 weeks of pregnancy, or nine weeks after conception. A baby's head makes up about half of his or her length at this stage.
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