Nokea
What does the nurse explain can affect the survival of the X- and Y-bearing sperm after intercourse?
- A. Age
- B. Estrogen level
- C. Body temperature
- D. Level of feminine hygiene
Correct Answer: B
Rationale: Estrogen levels and the pH of the female reproductive tract can affect the survival of the X and Y-bearing sperm as well as their motility.
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What complication can result from untreated respiratory distress in the newborn?
- A. Esophageal atresia
- B. Gastric dilation
- C. Cold stress
- D. Reopening of the foramen ovale
Correct Answer: D
Rationale: Respiratory distress can cause increased pressure in the right ventricle, causing reopening of the foramen ovale.
The nurse explains that the birth weight of monozygotic twins is frequently below average. What is the most likely cause?
- A. Inadequate space in the uterus
- B. Inadequate blood supply
- C. Inadequate maternal health
- D. Inadequate placental nutrition
Correct Answer: D
Rationale: The single placenta may not be able to provide adequate nutrition to two fetuses.
At what point in prenatal development do the lungs begin to produce surfactant?
- A. 17 weeks
- B. 20 weeks
- C. 25 weeks
- D. 30 weeks
Correct Answer: C
Rationale: During week 25, the alveoli begin to produce surfactant, which enables the alveoli to stay open for adequate lung oxygenation to occur.
A patient at the obstetric office has just learned she is pregnant with dizygotic twins. What facts will the nurse include when educating this patient? (Select all that apply.)
- A. Dizygotic twins are the same sex.
- B. Dizygotic twins share a placenta.
- C. Dizygotic pregnancies tend to repeat in families.
- D. Dizygotic twins have separate chorions.
- E. Dizygotic twin incidence decreases with maternal age.
Correct Answer: C,D
Rationale: Dizygotic twins tend to repeat in families and have separate chorions. They can be the same sex or different sexes and have their own placenta. Incidence increases with maternal age.
The normal volume of amniotic fluid is approximately __ mL at 37 weeks' gestation.
Correct Answer: 1000
Rationale: The volume of amniotic fluid steadily increases from about 30 mL at 10 weeks of pregnancy to 350 mL at 20 weeks. The volume of fluid is about 1000 mL at 37 weeks. In the latter part of pregnancy, the fetus may swallow up to 400 mL of amniotic fluid per day and normally excretes urine into the fluid.