Nokea
With regard to prenatal genetic testing, nurses should be aware that:
- A. Maternal serum screening can determine whether a pregnant woman is at risk of carrying a fetus with Down syndrome.
- B. Carrier screening tests look for gene mutations of people already showing symptoms of a disease.
- C. Predisposition testing predicts with near certainty that symptoms will appear.
- D. Presymptomatic testing is used to predict the likelihood of breast cancer.
Correct Answer: A
Rationale: Maternal serum screening identifies the risk for the neural tube defect and the specific chromosome abnormality involved in Down syndrome.
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The nurse is providing education to a pregnant person at 10 weeks’ gestation who is experiencing nausea and vomiting. The nurse is aware the nausea and vomiting are due to which hormone produced by the placenta?
- A. relaxin
- B. human chorionic gonadotropin
- C. human placental lactogen
- D. luteinizing hormone
Correct Answer: B
Rationale: The correct answer is B: human chorionic gonadotropin (hCG). At 10 weeks' gestation, hCG is the hormone produced by the placenta responsible for nausea and vomiting, known as morning sickness. hCG levels peak around this time, coinciding with the onset of these symptoms. Relaxin (A), human placental lactogen (C), and luteinizing hormone (D) are not directly associated with causing nausea and vomiting in pregnancy.
With regard to the development of the respiratory system, maternity nurses should understand that:
- A. The respiratory system does not begin developing until after the embryonic stage.
- B. The infant's lungs are considered mature when the lecithin/sphingomyelin [L/S] ratio is 1:1, at about 32 weeks.
- C. Maternal hypertension can reduce maternal-placental blood flow, accelerating lung maturity.
- D. Fetal respiratory movements are not visible on ultrasound scans until at least 16 weeks.
Correct Answer: C
Rationale: A reduction in placental blood flow stresses the fetus, increases blood levels of corticosteroids, and accelerates lung maturity.
The nurse is answering a phone call from a pregnant person. The pregnant person informs the nurse she has had several sharp pains in the right lower abdomen this week. What is the priority question the nurse should ask the pregnant person?
- A. How many weeks pregnant are you?
- B. How much water are you drinking every day?
- C. When was your last bowel movement?
- D. Are you lactose intolerant?
Correct Answer: A
Rationale: The correct answer is A: How many weeks pregnant are you? This is the priority question because sharp pains in the right lower abdomen could indicate an ectopic pregnancy or appendicitis, both of which are serious conditions requiring immediate medical attention. Knowing the gestational age will help the nurse determine the likelihood of these complications.
Choice B: How much water are you drinking every day? is not the priority question as it is unlikely to be related to the sharp pains in the right lower abdomen.
Choice C: When was your last bowel movement? is not the priority question as it is not directly related to the sharp pains in the right lower abdomen.
Choice D: Are you lactose intolerant? is not the priority question as it is not likely to be the cause of sharp pains in the right lower abdomen for a pregnant person.
A woman who is assessing fetal movements each day should notify her health care provider if:
- A. More than six movements are felt during a 30- to 60-minute period.
- B. Fetal movements are fewer than the minimum set by the provider.
- C. The movement pattern remains about the same from day to day.
- D. Fetal movements are more frequent during the evening than in the morning.
Correct Answer: B
Rationale: Decreased fetal movement may indicate a potential issue and requires further evaluation.
Sally comes in for her first prenatal examination. This is her first child. She asks you (the nurse), 'How does my baby get air inside my uterus?' The correct response is:
- A. The baby's lungs work in utero to exchange oxygen and carbon dioxide.
- B. The baby absorbs oxygen from your blood system.
- C. The placenta provides oxygen to the baby and excretes carbon dioxide into your bloodstream.
- D. The placenta delivers oxygen-rich blood through the umbilical artery to the baby's abdomen.
Correct Answer: C
Rationale: The placenta functions by supplying oxygen and excreting carbon dioxide to the maternal bloodstream.