Slide show: Fetal ultrasound
Image of an l ultrasound showing a fetus’ head
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This is a view of a baby's head. The thick white lines that form a circle near the top of the image indicate the baby's skull. The white line in the middle of the circle is the midline structure that separates the baby's brain into a right and left half.

Measurements of your baby's head can help your health care provider determine your baby's age.

See more Multimedia Oct. 10, 2015