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What is the purpose of intracytoplasmic sperm injection (ICSI) in IVF procedures?
- A. To allow multiple sperm to fertilize an egg for better results.
- B. To assist fertilization by injecting a single sperm directly into an egg.
- C. To ensure ovulation occurs during stimulation cycles.
- D. To bypass ovarian stimulation entirely.
Correct Answer: B
Rationale: The correct answer is B, to assist fertilization by injecting a single sperm directly into an egg. In ICSI, a single sperm is carefully selected and injected into an egg to aid fertilization, particularly in cases of male infertility. This method ensures that fertilization occurs successfully by bypassing natural barriers. Choice A is incorrect as multiple sperm fertilizing an egg can lead to genetic abnormalities. Choice C is incorrect as ovulation is induced before egg retrieval, not during stimulation cycles. Choice D is incorrect as ovarian stimulation is necessary to produce multiple eggs for retrieval.
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A nurse is describing how the fetus moves through the birth canal. Which component would the nurse identify as being most important in allowing the fetal head to move through the pelvis?
- A. sutures
- B. fontanelles
- C. frontal bones
- D. biparietal diameter
Correct Answer: A
Rationale: Sutures are important because they allow the cranial bones to overlap in order for the head to adjust in shape when pressure is exerted on it. Fontanelles are the intersections formed by the sutures. The frontal bones and biparietal diameter are not as crucial in allowing the fetal head to move through the pelvis.
How does lifestyle modification improve male fertility?
- A. By directly increasing sperm motility and morphology.
- B. By reducing stress and improving overall reproductive health.
- C. By guaranteeing successful fertilization.
- D. By eliminating the need for medical treatments.
Correct Answer: B
Rationale: The correct answer is B because lifestyle modifications such as reducing stress, maintaining a healthy weight, avoiding harmful substances, and exercising can improve male fertility by optimizing overall reproductive health. Stress reduction can positively impact hormone levels and sperm production. Choices A, C, and D are incorrect because lifestyle modifications do not directly guarantee successful fertilization, eliminate the need for medical treatments, or directly improve sperm motility and morphology.
A 3-month-old baby has been diagnosed with cystic fibrosis (CF). The mother says, 'How could this happen? I had an amniocentesis during my pregnancy and everything was supposed to be normal!' What must the nurse understand about this situation?
- A. Cystic fibrosis cannot be diagnosed by amniocentesis.
- B. The baby may have an uncommon genetic variant of the disease.
- C. It is possible that the laboratory technician made an error.
- D. Instead of obtaining fetal cells the doctor probably harvested maternal cells.
Correct Answer: B
Rationale: Uncommon genetic variants of CF may not be detected by standard testing.
A client's basal body temperature (BBT) chart for one full month is shown below. Based on the temperatures shown, what can the nurse conclude?
- A. It is likely that she has not ovulated.
- B. The client's fertile period is between 12 and 18 days.
- C. The client's period is abnormally long.
- D. It is likely that her progesterone levels rose on day 15.
Correct Answer: D
Rationale: A biphasic BBT pattern indicates ovulation, with rising temperatures reflecting progesterone elevation.
A woman in her 40th week of pregnancy calls the nurse at the clinic and says she is not sure whether she is in true or false labor. Which statement by the client would lead the nurse to suspect that the woman is experiencing false labor?
- A. I'm feeling contractions mostly in my back.
- B. My contractions are about 6 minutes apart and regular.
- C. The contractions slow down when I walk around.
- D. If I try to talk to my partner during a contraction, I can't.
Correct Answer: C
Rationale: The statement The contractions slow down when I walk around indicates that the contractions are irregular and weak, which is characteristic of false labor. In true labor, contractions are regular, strong, and do not slow down with movement.