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Expectant parents of twins tell the nurse they are having fraternal twins and are asking the nurse what that means. Which reply of the nurse is correct?
- A. Your twins will both be boys.
- B. Your twins are called monozygotic.
- C. You have one placenta and one of each of the fetal membranes called the chorion and amnion.
- D. Your twins will be as alike as any two siblings.
Correct Answer: D
Rationale: Fraternal twins are dizygotic, meaning they are as genetically similar as any other siblings.
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What patient statement indicates the need for further education about amniocentesis?
- A. “It can be used to test for neural tube defects.”
- B. “It is performed between 15 and 20 weeks’ gestation.”
- C. “It is performed using a sterile needle to withdraw a sample of amniotic fluid.”
- D. “The sample can be obtained using a transcervical approach.”
Correct Answer: D
Rationale: Amniocentesis is performed transabdominally, not transcervically, to obtain amniotic fluid.
The nurse must be cognizant that an individual's genetic makeup is known as his or her:
- A. Genotype.
- B. Phenotype.
- C. Karyotype.
- D. Chromotype.
Correct Answer: A
Rationale: The genotype comprises all the genes the individual can pass on to a future generation.
Fetal circulation includes 3 shunts. Match each shunt to its physiologic action. Ductus arteriosus
- A. Connects the pulmonary artery and the aorta, bypassing the lungs.
- B. Connects the right and left atria.
- C. Connects the right and left ventricles.
- D. Allows the umbilical vein to bypass the liver to flow into the inferior vena cava.
Correct Answer: A
Rationale: Ductus arteriosus connects the pulmonary artery and aorta.
What are probable signs of pregnancy? Select all that apply.
- A. amenorrhea
- B. fetal movement
- C. Goodell sign
- D. positive pregnancy test
Correct Answer: B
Rationale: Probable signs include Goodell sign, positive pregnancy test, and skin hyperpigmentation. Amenorrhea and fetal movement are subjective or definitive signs.
During a pregnant woman’s second trimester anatomy scan, the fetus was in breech position. The patient is now 34 weeks pregnant and asks how she can tell if the baby is in the right position. What test might be ordered to determine this?
- A. a biophysical profile
- B. an ultrasound
- C. a fetoscopy
- D. a nonstress test
Correct Answer: B
Rationale: An ultrasound can determine the fetus's position. Other tests are not typically used for this purpose.