1. A baby begins when an egg cell (ovum) is fertilized by a reproductive cell (sperm) to form a fertilized egg.
The new egg cell keeps dividing as you mature.
These cells begin to differentiate in structure and function.

2. Uterus – The mother’s womb.
At the end of the first week a baby burrows into the lining of the uterus.

4. Week 2 - a structure grows between the baby and mother’s body called a placenta.

5. Placenta – Keeps the baby attached to wall of the uterus.
Allows for exchanges between the baby’s blood and mother’s blood.
Serves as the babies kidneys, lungs, and intestines.

6. Week 3 – The Umbilical Cord forms.
Heart starts beating

7. Umbilical Cord – Three blood vessels.
Where oxygen and nutrients from the mother come through after being filtered by the placenta.

8. Beginning of arms, legs, nose, and cheeks was taking shape.
Week 4
1/5 inch long
Beginning of arms, legs, nose, and cheeks was taking shape.

9. Fingers, lungs, trachea, esophagus, and stomach starting to form.
Week 5
½ inch long.
Fingers, lungs, trachea, esophagus, and stomach starting to form.
Have muscles!

10. Ears and heart begin to form.
Week 6
Ears and heart begin to form.

11. All major organs established
Week 7
Toes formed
All major organs established
Less than an inch long and only 1/6 of an ounce.
Look like a baby!

12. Completing somersaults and moving!
Week 8
Slept and exercised
Completing somersaults and moving!

13. Lips formed and cheeks get bigger. Open, close mouth, and yawn.
Week 9-10
Lips formed and cheeks get bigger.
Open, close mouth, and yawn.
Fingernails, taste buds, and fingerprints form.

14. ¾ an ounce and 2 inches long, growing quick!
Week 11
¾ an ounce and 2 inches long, growing quick!
Chin formed.
Thymus and lymph nodes developing.

15. Week 12
Ribs visible.
1 ounce and 3 inches long.
Make faces
Drink

16. 6 inches in length and 4 ounces. Mother can feel baby move.
Week 13-16
6 inches in length and 4 ounces.
Hair starts growing.
Mother can feel baby move.

17. Look very similar to how baby will look when born.
5 Months
10 inches long.
Look very similar to how baby will look when born.

18. Eyebrows and eyelashes visible Others can see baby move
6 Months
Eyebrows and eyelashes visible
Hear noises
12 inches long
Others can see baby move

19. Brain can control breathing and swallowing.
7 Months
Eyes can open
Can taste things
Brain can control breathing and swallowing.

20. Fingernails finish forming
8 Months
Fingernails finish forming
Turn upside down

21. Uterus kicks the baby out!
9 Months
Uterus kicks the baby out!