Prenatal Development & Childbirth

Question 1

3 periods of embryonic dev

Answer 1

1. germinal
2. embryonic
3. fetal

Question 2

germinal period

Answer 2

• first 2 wks
• zygote created
• zygote attaches to uterine wall

Question 3

embryonic period

Answer 3

• wks 2-8
• layers of cells form
• layers develop into organs and support systems

Question 4

fetal period

Answer 4

• wks 8 - 40

- period of major growth and dev

Question 5

1st trimester growth + wt

Answer 5

to 3” and 1oz

Question 6

1st trimester milestones (4)

Answer 6

1. organ systems develop (NS/gastro/heart/lungs) –> by 8 wks heart bt detectable & brain forming
2. can move limbs/digits –> by 8 wks responds to touch
3. can smile, frown, suck, swallow
4. gender visible (by 12 wks)

Question 7

3rd trimester growth + wt

Answer 7

to 19” and 6-7lbs by 38 wks

Question 8

2nd trimester milestones (6)

Answer 8

1. skin protected by vernix and lanugo
2. heart beat can be heard on stethoscope
3. eyes open (by 24 wks)
4. can suck thumb, roll over, strong grip, mom feels mvmt
5. has hair/nails/eyelashes/eyebrows
6. can feel pain

Question 9

Thumb sucking can be observed by

Answer 9

8 to 9 weeks

Question 10

3rd trimester milestones (6)

Answer 10

1. lanugo nearly gone
2. age of viability reached (22-26 wks)
3. fetus usually assumes upside-down position
4. continued increase in body fat
5. skull bones = soft and pliable
6. very responsive to stimuli (touch/sound/light)

Question 11

It is possible for the baby to survive outside the womb by

Answer 11

22 to 26 weeks

Question 12

Breathing motions can be observed by

Answer 12

30 weeks

Question 13

vernix

Answer 13

milky substance protecting skin of fetus

Question 14

lanugo

Answer 14

fine hairs coating body of fetus in 2nd trimester

Question 15

arteries and veins of heart are complete by

Answer 15

7-8 weeks