- Your baby's bones are fully formed, but still soft.
- Your baby's kicks and jabs are forceful.
- The eyes can open and close and sense changes in light.
- Lungs are not fully formed, but practice "breathing" movements occur.
- Your baby's body begins to store vital minerals, such as iron and calcium.
- Lanugo begins to fall off.
- Your baby is gaining weight quickly, about one-half pound a week. Now, your baby is about 15 to 17 inches long and weighs about 4 to 4½ pounds.
Source: www.womenshealth.gov
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