Slide show: Fetal ultrasound
Image of a fetal ultrasound slide showing the lens of baby's eye
Previous Next 8 of 14

Any guesses about this image? It's the lens of a baby's eye.

Twenty-three weeks into pregnancy, or 21 weeks after conception, a baby begins to have rapid eye movements. A baby's eyelids begin to open 28 weeks into pregnancy, or 26 weeks after conception.

See more Multimedia