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Fetal Size: Length, 11 3/4 inches, crown to rump; total length almost 18 inches. Weight, 3 1/2 pounds.
Fetal Development Milestones: Baby continues to develop as he or she gains weight.
What You're Seeing: This image gives a close-up view of the lower end of your unborn baby's spine. You can see the spinal cord protected by the bright white bones of the spine.
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