1. Prenatal Terms Belly People Embryo (weeks 3-8)
From the time of implantation into the uterine wall through about the eighth week of pregnancy
Zygote (week 0-2)
Zygote grows to be about the size of a pin head
Fetus (weeks 9-40)

2. Month 1 Events for Baby Embryo phase begins 25 – heart beats regularly
Days after conception:
9 – begins to take shape
17 – has blood cells
18 – occasional heart pulsation
19 – eyes start to develop
20 – nervous system foundation set
24 – vital organs begin
25 – heart beats regularly
28 – 40 pairs of muscles, limb buds, trunk of body is formed
30 – develops ears and nose
31 – hand, arm, shoulder region formed
33 – hand section formed
Baby ¼” long (length of rice)

3. Month 2 Events Baby is 1.5” long
Internal organs and neural system still forming
Blood is circulating
40 days – body movements visible by ultrasound
42 days – skeleton complete
43 days – brain puts off electrical brain waves
49 days – has a miniature doll appearance
56 days – moves, squints, swallows, yawns, and tongue moves.
Baby is 1.5” long

4. 1 ½ days to complete Workbook pages 5-11
8 Prenatal stations
1 ½ days to complete Workbook pages 5-11

5. Pre-natal Development “House”
Uterus / Womb
The fetus grows inside this.

6. Placenta (Latin for Cake)
Flat pancake shaped organ with amniotic sac attached to one side and the umbilical cord attached to the other.
filters nutrients and oxygen to the fetus.
At 4 months completely developed
By birth it is 1” thick, 8” diameter, 1lb
If the woman is undernourished during her pregnancy, the placenta does not transfer essential nutrients to the fetus.

7. Umbilical Cord
20” long and reaches from fetus’ stomach to the placenta.
Carries away waste from the baby and returns the waste products back to the mother.
Brings oxygen, food, and nutrient rich blood to the embryo to keep it alive.
▪ Thick garden-like hose that will not knot due to Whartons’ Jelly substance.

8. Amniotic Sac and Amniotic Fluid
Sac contains embryo and amniotic fluid
A clear and transparent membrane that is very strong until broken
4 cups of amniotic fluid at birth that is replenished 9 times a day.
The fluid protects baby from bumps, bruises, and jolts
Prevents shock to the fetus, keeps a constant temperature, and keeps the fetus from adhering to the uterine wall.

9. Station #2 Month at a Time
Use this link to help you fill in this portion of your study guide
Station #2 Month at a Time

10. Month 0 Begins 3 weeks after 1st day of last period
Ovulation occurred and the egg/ovum was released
Sperm (several hundred million) deposited into female’s body and begins travel to find the egg in the fallopian tube.
The sperm beats against the ovum membrane
Sperm sheds its tail and burrows inside.
2 cells now become one and begin to quickly divide to form a human being.
Begins to travel down the fallopian tube and 5-7 days after conception, the zygote implants itself into the endometrial lining

11. By the end of the First Month for Mom
Misses her period.
Already 2 weeks pregnant when she skips a period.
Changes in estrogen & progesterone levels.

12. Second Month for Mom Nausea/Vomitting (Morning Sickness)
Frequent urination
Mood swings

13. Second Month for Baby Head develops rapidly.
Face, eyes, and ears take shape.
Internal organs
Sex organs.
Arm & leg buds.
Nails are forming
1 inch 1/10 oz.

16. Nutrition for a Pregnant
Woman - Link

20. Third Month for Mom Continued nausea. Frequent urination. Cravings.
Increased appetite.

21. Third Month for Baby Head grows rapidly. Bone formation.
Digestive organs function.
Arms, legs and fingers move.
3 inches 1 oz.

23. End of the First Trimester
Time for mom to adjust to pregnancy.
Baby grows most rapidly.
All internal organs are complete.
Mom must be very careful with health.

24. Fourth Month for Mom Body is adjusted to pregnancy.
Increased appetite.
Gained 2-4 lbs.
Clothes fitting snug.

25. Fourth Month for Baby Bones harden. Actively moving.
Lower parts of body grow rapidly.
Sex organs fully formed.
Heartbeat detected.
7 inches 5 oz.

26. Fifth Month for Mom Mild back-aches. Size change is obvious to others.
Hears heart beat.
Ultrasound.
Feels movement.
Gains 5-8 lbs.

27. Fifth Month for Baby Lanugo hair. Vernix.
Ears and nose develop cartilage.
Finger and toe nails.
Can suck thumb, hiccup, and kick.
12 inches 14 oz.

28. Sixth Month for Mom
Increased need for sleep.
Gained lbs.

29. Sixth Month for Baby Eyes and eyelids fully formed.
Fat developing under skin.
Practices breathing movements.
14 inches 2 pounds

30. End of Second Trimester
Baby continues to develop and grow.
Mom feels good.
Easiest trimester for mom and baby.

31. Seventh Month for Mom Effects posture. Leg cramps. Back-aches.
Waddling.
Gains pounds.

32. Seventh Month for Baby Brain developing rapidly.
Inhales amniotic fluid to develop lungs.
Gaining lots of weight.
17 inches 3 pounds

33. Eighth Month for Mom Heartburn. Difficulty breathing.
Multiple small meals.
Increased urination.
Back, leg and muscle aches.
Gains pounds.

34. Eighth Month for Baby Fat is stored for later use.
Fingernails reach beyond fingertips.
Rapid growth.
Sheds vernix & lanugo.
17 inches 5 pounds

35. Ninth Month for Mom Baby drops into pelvis. Contractions.
Gains pounds.
Gives birth!!!!

36. Ninth Month for Baby Organ system fully functional.
Vernix covers entire body.
Settle into head-down position for birth.
21 inches 7 pounds

37. End of Third Trimester Most difficult for mom.
Baby gains weight rapidly.
Both are ready for birth!