Fetal Development Quiz: Pregnancy Milestones

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2. Which of the following is NOT a major organ system that completes development by week 10?

Cardiovascular system

Nervous system

Respiratory system

Reproductive system

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5. Which fetal circulatory structure allows blood to bypass the lungs?

Ductus venosus

Foramen ovale

Ductus arteriosus

Umbilical vein

6. Throughout fetal development, the umbilical cord contains how many blood vessels?

One artery and one vein

Two arteries and one vein

One artery and two veins

Three arteries and two veins

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9. At week 36, the fetus typically assumes which position in preparation for delivery?

Breech (buttocks first)

Transverse (sideways)

Cephalic or vertex (head down)

Posterior (face up)

10. By week 32, what percentage of fetal lung surfactant production is typically achieved?

25%

50%

75%

90%

11. At what gestational week does the primitive streak first appear, marking the beginning of embryonic development?

Week 1

Week 2

Week 3

Week 4

12. By week 24, the lungs begin to develop surfactant. Why is this critical?

To prevent infection

To reduce alveolar surface tension and allow breathing

To increase oxygen carrying capacity

To strengthen the chest wall

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14. By week 16, quickening (fetal movements) may first be felt. Which mothers are most likely to detect this early?

First-time mothers

Multiparous mothers

Mothers carrying twins

Mothers over 35 years old

15. At week 12, the fetus is approximately how long (crown-rump length)?

2.5 cm

5.5 cm

7.5 cm

10 cm

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17. At week 7-8, limb buds appear. Which structure first becomes visible?

Upper limb buds

Lower limb buds

Webbing between digits

Fingernails

18. By week 5-6, the heart begins beating. What is the primary site of blood formation at this stage?

Bone marrow

Thymus

Yolk sac

Spleen

19. At week 4, which structure begins to fold and form the neural tube?

Notochord

Neural plate

Somites

Pharyngeal arches

20. By which week are the three primary germ layers (ectoderm, mesoderm, endoderm) established?

Week 2

Week 3

Week 4

Week 5

Fetal Development Quiz: Match Week to Milestone

1. At week 28, the fetus enters the third trimester. The eyelids ____ at this stage.

2.

What first name or nickname would you like us to use?

2. Which of the following is NOT a major organ system that completes development by week 10?

3. At birth, increased oxygen causes the foramen ovale to close functionally. This closure is called ____.

4. The ductus arteriosus allows blood to bypass the ____ during fetal life.

5. Which fetal circulatory structure allows blood to bypass the lungs?

6. Throughout fetal development, the umbilical cord contains how many blood vessels?

7. At week 39-40, the fetus descends into the pelvis. This is called ____.

8. By week 38-40, the fetus is considered term. Average birth weight is approximately ____ grams.

9. At week 36, the fetus typically assumes which position in preparation for delivery?

10. By week 32, what percentage of fetal lung surfactant production is typically achieved?

11. At what gestational week does the primitive streak first appear, marking the beginning of embryonic development?

12. By week 24, the lungs begin to develop surfactant. Why is this critical?

13. At week 20, the fetus weighs approximately ____ grams.

14. By week 16, quickening (fetal movements) may first be felt. Which mothers are most likely to detect this early?

15. At week 12, the fetus is approximately how long (crown-rump length)?

16. By week 10, most major organs have been formed. This period marks the transition from embryo to ____.

17. At week 7-8, limb buds appear. Which structure first becomes visible?

18. By week 5-6, the heart begins beating. What is the primary site of blood formation at this stage?

19. At week 4, which structure begins to fold and form the neural tube?

20. By which week are the three primary germ layers (ectoderm, mesoderm, endoderm) established?