10 Weeks Pregnant

Your Baby's Development at Week 10 of Pregnancy

During week 10 of your pregnancy, your baby's brain is growing at a rapid pace. It will produce about 250,000 neurons every minute. When you are at 10 weeks pregnant, your baby is now 1.25 to 1.68 inches long and weighs approximately 0.18 ounces (equal to the weight of a quarter).
 
Week 10 of pregnancy is somewhat of a milestone because the body plan for the baby has been laid out and most things are present -- just in miniature form.
 
Specific developments that typically occur during week 10 of pregnancy include the following:
 
  • The baby's eyelids are no longer transparent
  • The outer ears start to assume their final form
  • Tooth buds begin to form
  • The testes will start producing the male hormone testosterone in males
  • Your baby will have fully separated fingers and toes
  • The embryonic tail will have disappeared completely
  • The bones of your baby's skeleton will have begun to form
  • The eyes have moved from the sides of the head closer to the front of the face
  • The palate and the roof of the mouth form
  • The stomach moves into its final position
  • Taste buds begin to form
  • Neck muscles are forming
  • The clitoris appears in females, and the ovaries begin to descend
  • The two lobes of the lungs extend into many tiny tubes (bronchioles)
  • The diaphragm begins to separate the heart and lungs from the stomach.
     
 
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