Weeks 9 and 10: Teeth begin to form, fingernails develop. The baby can turn his head and frown. The baby can hiccup. The baby is the size of a green olive.
Weeks 10 and 11: The baby can “breathe” amniotic fluid and urinate. The baby is the size of a prune.
Week 11: The baby can grasp objects placed in its hand; all organ systems are functioning. The baby has a skeletal structure, nerves and circulation. The baby is now the size of a lime.