monozygotic mz twins are known as fraternal twins
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Maternity HESI Practice Questions

1. Monozygotic (MZ) twins are known as fraternal twins.

Correct answer: B

Rationale: The correct answer is B: 'FALSE.' Monozygotic (MZ) twins are identical twins, not fraternal. Fraternal twins are dizygotic (DZ). The statement in the question is incorrect as MZ twins are genetically identical, while fraternal twins actually refer to dizygotic twins who develop from two separate fertilized eggs. Therefore, monozygotic twins are not known as fraternal twins, making option B the correct choice. Options A, C, and D are incorrect as they do not accurately describe the relationship between monozygotic and fraternal twins.

2. Does a blastocyst gain mass only when it receives nourishment from outside?

Correct answer: A

Rationale: A blastocyst does indeed require external nourishment from the mother's body to continue developing and gaining mass. Without this external nourishment, the blastocyst would not be able to grow and develop properly. Therefore, the statement that a blastocyst gains mass only when it receives nourishment from outside is true. Choices B, C, and D are incorrect because they do not accurately reflect the dependency of a blastocyst on external nourishment for its development and growth.

3. What nursing action should the nurse implement for a 3-hour-old male infant who presents with cyanotic hands and feet, an axillary temperature of 96.5°F (35.8°C), a respiratory rate of 40 breaths per minute, and a heart rate of 165 beats per minute?

Correct answer: B

Rationale: The correct nursing action is to gradually warm the infant under a radiant heat source. The infant is presenting with signs of cold stress, indicated by cyanotic extremities and a low body temperature. Gradual warming is crucial to stabilize the infant's temperature and prevent further complications. Administering oxygen, notifying the pediatrician, or performing a heel-stick are not the priority actions in this scenario and may not address the immediate need to raise the infant's body temperature.

4. Is a low sperm count or lack of sperm the most common infertility problem in men?

Correct answer: A

Rationale: A low sperm count or lack of sperm is indeed one of the most common causes of infertility in men. Factors such as hormonal imbalances, genetic issues, reproductive anatomy problems, and lifestyle factors can also contribute to male infertility. Choice B is incorrect because a low sperm count is a prevalent issue among men facing infertility, making it a common problem. Choices C and D are incorrect as they do not accurately reflect the prevalence of low sperm count as a cause of infertility in men.

5. A nurse on the postpartum unit is caring for four clients. For which of the following clients should the nurse notify the provider?

Correct answer: C

Rationale: The correct answer is C because in a client receiving magnesium sulfate, absent deep tendon reflexes can indicate magnesium toxicity, which requires immediate intervention to prevent serious complications. Choices A, B, and D are common postpartum occurrences that do not typically warrant immediate provider notification. A urinary output of 300 ml in 8 hours, abdominal cramping during breastfeeding, and frequent changing of perineal pads due to lochia rubra are within the expected range of postpartum recovery and do not indicate an urgent need for provider notification.

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