Title: When Does an Embryo Become a Fetus? | New Health Advisor
Headings: When Does an Embryo Become a Fetus?
When Does an Embryo Become a Fetus?
When Does an Embryo Become a Fetus?
The First Trimester: Baby Development Week by Week
Week 1-2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
Week 11
Week 12
Embryo to Fetus: Weeks 9 to 12 of Pregnancy
What Happens Next?

Content: Leg and arm buds begin to grow, ears and eyes begin to form, and there is tissue growth that will eventually develop into the spinal chord and other bones. Week 7
At this time, the child’s facial features are rapidly developing, so is the brain. Small nostrils are now visible and the lenses of the eyes start developing. Arm buds develop further to become paddle-shaped. The baby is around the size of the top of a pencil eraser, or slightly bigger. Week 8
The arms and legs of the growing child become longer, and hands and feet begin to form. The brain continues to steadily grow and develop, and the lungs start to form. The baby’s ears begin to develop a shell-shaped structure, and the eyes are now visible. The nose and upper lip have formed, and the baby’s body is beginning to straighten. Now the baby is around half an inch long.