Weeks 9-10
You should know that fetal lengths and weights given are merely averages. Babies are measured from the top of the head to the rump, or bottom, before 20 weeks. After that they are measured head to heel.
9 Weeks Gestational Age (from the first day of the last period)
The baby measures 3/4 of an inch long and weighs almost 1/8 of an ounce. The developing ears and nose are visible, and there is pigment in the retina. Then limbs and fingers are growing rapidly, and the bones in the arms are beginning to calcify and harden.
10 Weeks
The baby’s brain is growing rapidly. Each minute it produces almost 250,000 new neurons! The upper and lower portions of the arms and legs are clearly seen, as well as the fingers and toes. The external ear is fully developed. A baby boy begins to produce testosterone.
9 Weeks Gestational Age (from the first day of the last period)
The baby measures 3/4 of an inch long and weighs almost 1/8 of an ounce. The developing ears and nose are visible, and there is pigment in the retina. Then limbs and fingers are growing rapidly, and the bones in the arms are beginning to calcify and harden.
10 Weeks
The baby’s brain is growing rapidly. Each minute it produces almost 250,000 new neurons! The upper and lower portions of the arms and legs are clearly seen, as well as the fingers and toes. The external ear is fully developed. A baby boy begins to produce testosterone.