Fetal Development (via sonniersm)

• Rapid cell division

• Implantation occurs

• High vulnerability (all or nothing outcome)

Germinal Period

0-2 weeks

The germinal period is _____ weeks

• Critical periods

• Neural tube fusion (28 days)

• Limb buds appear (~28-30 days)

• Heartbeat begins (~week 5)

• Fingers/toes form (~week 8)

Embryonic Period

3-8 weeks

The embryonic period is _____ weeks

day 28

In the embryonic period, neural tube fusion begins at

day 28-30

In the embryonic period, limbs, ears, and optic pits appear

day 35

In the embryonic period, heartbeat develops, tactile sense develops, and head on body righting

day 44

In the embryonic period, semicircular canals develop at

8 weeks

In the embryonic period, fingers, toes, eyelids, ears, head begins to round, and nasal structures move to midline at

3-6 months

The early fetal period is _____ months

9 weeks

In the fetal period, external genitalia develops at

9-12 weeks

In the fetal period, limb buds grow at

11-13 weeks

In the fetal period, taste buds develop at

13-15 weeks

In the fetal period, nasal plugs disappear and olfactor N develops at

13-16 weeks

In the fetal period, ossification centers for bone develops at

14 weeks

In the fetal period, slow eye movement begins at

16 weeks

In the fetal period, the eyes and nose move to midline at

7-9 months

The late fetal period is _____ months

20-22 weeks

In the fetal period, the eyes form, hearing begins, skin develops, and surfactant develops at-

24-28 weeks

In the fetal period, eyelids separate and blink & the fingers and toenails develop at-

26 weeks

In the fetal period, the eyelids open, theres rapid eye maturation, and the rooting reflex is present

26-28 weeks

In the fetal period, taste is developed and facial movements begin at

28 weeks

In the fetal period, the gyri develops at-

26-29 weeks

In the fetal period, pulmonary development is at-

30-34 weeks

In the fetal period, the pupillary reflex develops and there is increased survival rate at

35-38 weeks

In the fetal period, grasp develops and can orient to light, the head/abdomen are the same size, and there is awake visual alertness

week 5

The critical period for the heart is week-

Heart

First functioning organ — in tubular form

• Week 21: surfactant begins

• Week 26-29: lungs develop enough to breathe

• Week 32: alveoli developed for better gas exchange

Critical period for the lungs

week 21

For the lungs, surfactant begins at-

week 26-29

The lungs are developed enough to breathe at-

week 32

alveoli are developed for better gas exchange at-

week 3

Critical period for primitive streak is at-

week 4

Neural plate and neural tube fusion begins at-

True

T/F? Gyri are formed through week 28

day 28-30

Limb buds appear at-

day 54-55 or 9-12 weeks

Limb buds grow/fingers and toes form at-

13-16 weeks

Ossification begins at-