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The nurse is planning a prenatal class on fetal development. Which characteristics of prenatal development should the nurse include for a fetus of 24 weeks, based on fertilization age? (Select all that apply.)
- A. Ear cartilage firm
- B. Skin wrinkled and red
- C. Testes descending toward the inguinal rings
- D. Surfactant production nears mature levels
Correct Answer: A
Rationale: A. Ear cartilage firm: By 24 weeks, the fetus's ear cartilage has developed and become firm, allowing the ears to be more defined in shape.
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The nurse caring for a pregnant patient knows that her health teaching regarding fetal circulation has been effective when the patient reports that she has been sleeping:
- A. In a side-lying position.
- B. On her back with a pillow under her knees.
- C. With the head of the bed elevated.
- D. On her abdomen.
Correct Answer: A
Rationale: Optimal circulation is achieved when the woman is lying at rest on her side.
At approximately ___ weeks of gestation, lecithin is forming on the alveolar surfaces, the eyelids open, and the fetus measures approximately 27 cm crown to rump and weighs approximately 1110 g.
- A. 20
- B. 24
- C. 28
- D. 30
Correct Answer: C
Rationale: These milestones of human development occur at approximately 28 weeks.
An expectant mother asks the nurse when her baby’s heart will begin to beat. The nurse explains that this will occur at which time?
- A. The 8th gestational week
- B. The 4th gestational week
- C. The 12th gestational week
- D. The 16th gestational week
Correct Answer: B
Rationale: The heart begins to beat by the 4th gestational week.
What occurs in the intervillous space in the developing placenta?
- A. None
- B. Oxygen and nutrients perfuse across the chorion villi to enter fetal circulation.
- C. None
- D. None
Correct Answer: B
Rationale: This is the primary function of the intervillous space.
A patient who is 16 weeks pregnant with her first baby asks how long it will be before she
feels the baby move. Which is the nurse’s best answer?
- A. “You should have felt the baby move by now.”
- B. “The baby is moving, but you can’t feel it yet.”
- C. “Some babies are quiet and you don’t feel them mov
- D. “Within the next month you should start to feel fluttering sensations.”
Correct Answer: D
Rationale: Maternal perception of fetal movement (quickening) usually begins between 17 and 20 weeks
after conception. Because this is her first pregnancy, movement is felt toward the later part of
the 17 to 20 weeks. “The baby is moving, but you can’t feel it yet” may be alarming to the
woman. “Some babies are quiet and you don’t feel them move” is a true statement; the fetus’
movements are not strong enough to be felt until 17 to 20 weeks; however, this statement does
not answer the woman’s concern. Fetal movement should be felt between 17 and 20 weeks; if
movement is not perceptible by the end of that time, further assessment will be necessary.