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Fetal Size: Length, 7 1/4 inches, crown to rump; weight, 10 1/2 ounces.
Fetal Development Milestones: Baby is swallowing amniotic fluid. Bone marrow is beginning to produce red blood cells. Baby moves and wiggles frequently.
What You're Seeing: This profile image not only shows how your baby-to-be's bones and skeletal structures are forming, but also his lungs. Looking at his chest, the sonographer can identify the heart and lung tissue.
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