Nokea
The parents have just received news that their infant has sickle cell disease. They ask the nurse if this could happen to future children. Because this is an example of an autosomal-recessive inheritance, what should the nurse tell Tim and Katie?
- A. Because this child has sickle cell, there is a decreased chance none of your other children will have sickle cell disease.
- B. Each time you get pregnant, there will be a 50/50 chance that your child will have sickle cell disease.
- C. Each time you get pregnant, there will be a 25% chance that your child will inherit the gene from each parent and will have sickle cell disease.
- D. Your next child will have a 50% chance of being a carrier for sickle cell disease.
Correct Answer: C
Rationale: The correct answer is C: Each time you get pregnant, there will be a 25% chance that your child will inherit the gene from each parent and will have sickle cell disease. This is because sickle cell disease follows an autosomal-recessive inheritance pattern, meaning both parents must pass on the sickle cell gene for a child to have the disease. With each pregnancy, there is a 25% chance that the child will inherit one sickle cell gene from each parent, resulting in the disease. Choices A and D are incorrect because they do not accurately reflect the inheritance pattern of sickle cell disease. Choice B is incorrect because it suggests a 50/50 chance, which is not the case with autosomal-recessive inheritance.
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Chromosome analysis is a diagnostic test that should be offered to which couple?
- A. Never conceived.
- B. Has long-standing infertility.
- C. Has had repeated pregnancy losses.
- D. Has a normal child but has not conceived again.
Correct Answer: C
Rationale: Rationale: Choice C is correct because chromosome analysis is recommended for couples who have experienced repeated pregnancy losses to identify any genetic abnormalities that may be causing the miscarriages. This test can help determine if there are chromosomal issues that could be addressed in future pregnancies. Choices A, B, and D do not necessarily warrant chromosome analysis as they do not directly relate to the potential genetic causes of pregnancy losses.
A patient undergoing IUI asks how the procedure increases the chances of conception. What should the nurse explain?
- A. IUI bypasses the cervix, placing sperm directly in the uterus.
- B. IUI enhances egg quality before fertilization.
- C. IUI eliminates the need for ovulation tracking.
- D. IUI combines egg and sperm outside the body before transfer.
Correct Answer: A
Rationale: The correct answer is A because IUI (Intrauterine Insemination) bypasses the cervix and places sperm directly in the uterus, increasing the chances of sperm reaching the fallopian tubes to fertilize the egg. This method improves the sperm's proximity to the egg, optimizing the chances of conception. The other choices are incorrect because B (enhancing egg quality) is not achieved through IUI, C (eliminating ovulation tracking) is not true as tracking is still necessary for timing the procedure, and D (combining egg and sperm outside the body) describes in vitro fertilization (IVF), not IUI.
During fertility counseling, a patient asks about the impact of age on female fertility. What should the nurse explain?
- A. Female fertility remains constant until menopause.
- B. Fertility begins to decline significantly after age 35.
- C. Age only affects fertility if other health issues are present.
- D. Fertility is unaffected by age until the age of 50.
Correct Answer: B
Rationale: The correct answer is B because fertility significantly declines after age 35 due to a decrease in the quantity and quality of eggs. As women age, the risk of chromosomal abnormalities in eggs increases, impacting fertility. Other choices are incorrect because fertility does not remain constant until menopause (A), age affects fertility regardless of other health issues (C), and fertility starts declining well before the age of 50 (D).
During fertility counseling, a patient asks about the impact of smoking on reproductive health. What should the nurse explain?
- A. Smoking has no significant effect on fertility.
- B. Smoking reduces fertility by impairing egg quality and sperm motility.
- C. Smoking enhances the effectiveness of fertility medications.
- D. Smoking affects only male fertility.
Correct Answer: B
Rationale: The correct answer is B. Smoking reduces fertility by impairing egg quality and sperm motility. Nicotine and other harmful chemicals in cigarettes can damage reproductive organs and decrease the chances of conception. Smoking has been linked to decreased ovarian reserve in women and decreased sperm quality in men. Choice A is incorrect because smoking does have a significant negative effect on fertility. Choice C is incorrect as smoking does not enhance the effectiveness of fertility medications; in fact, it can reduce their effectiveness. Choice D is incorrect because smoking affects both male and female fertility, not just male fertility.
A 10-week gravid states that her sister's son has been diagnosed with an X-linked recessive disease, Duchenne muscular dystrophy. She questions the nurse about the disease. Which of the following responses is appropriate for the nurse to make?
- A. Because Duchenne muscular dystrophy is inherited through the woman
- B. it is advisable for you to see a genetic counselor.
- C. Duchenne muscular dystrophy usually occurs as a spontaneous mutation. It is very unlikely that your fetus is affected.
- D. Your child could acquire Duchenne muscular dystrophy only if both you and your husband carried the gene. You need to check your husband's family history.
Correct Answer: A
Rationale: Duchenne muscular dystrophy is X-linked recessive, meaning the mother must be a carrier for the child to be affected.