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The nurse in a genetic clinic interviews a couple and develops a pedigree chart. Which inheritance patterns does the pedigree chart portray?
- A. Autosomal recessive
- B. X-linked recessive
- C. Autosomal dominant
- D. X-linked dominant
Correct Answer: C
Rationale: The correct answer is C, Autosomal dominant. In an autosomal dominant inheritance pattern, the trait is passed down from generation to generation, affecting both males and females equally. This is indicated by the presence of the trait in every generation of the pedigree chart. In contrast, autosomal recessive traits would skip generations and require both parents to be carriers. X-linked recessive traits mainly affect males and skip generations. X-linked dominant traits would be present in every generation but would affect more females than males.
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A couple undergoing IVF asks about the role of progesterone injections post-transfer. What is the nurse's best explanation?
- A. Progesterone supports the uterine lining to help maintain a pregnancy.
- B. Progesterone improves egg quality during IVF cycles.
- C. Progesterone prevents the formation of ovarian cysts.
- D. Progesterone reduces the chances of multiple pregnancies.
Correct Answer: A
Rationale: The correct answer is A: Progesterone supports the uterine lining to help maintain a pregnancy post-transfer. Progesterone is crucial in preparing the uterine lining for embryo implantation and supporting early pregnancy. It helps thicken the endometrium, creating a hospitable environment for the embryo to implant and grow. Choice B is incorrect as progesterone does not directly improve egg quality. Choice C is incorrect as progesterone does not prevent ovarian cyst formation. Choice D is incorrect as progesterone does not reduce the chances of multiple pregnancies; in fact, it may slightly increase the risk of multiples in IVF.
A couple is learning about assisted reproductive technologies (ART). Which method involves retrieving eggs and fertilizing them outside the body?
- A. Intrauterine insemination (IUI)
- B. In-vitro fertilization (IVF)
- C. Ovarian stimulation
- D. Egg freezing
Correct Answer: B
Rationale: The correct answer is B: In-vitro fertilization (IVF). In IVF, eggs are retrieved from the ovaries and fertilized with sperm in a laboratory dish. This method involves fertilization outside the body, making it the correct choice.
A: Intrauterine insemination (IUI) involves placing washed sperm directly into the uterus, not fertilizing eggs outside the body.
C: Ovarian stimulation is a process to stimulate the ovaries to produce multiple eggs but does not involve fertilization outside the body.
D: Egg freezing is a method where eggs are frozen for future use but does not involve fertilization outside the body.
A nurse is counseling a couple on lifestyle modifications to improve fertility. Which recommendation is most appropriate?
- A. Increase caffeine intake for better energy.
- B. Maintain a healthy weight and avoid smoking.
- C. Engage in intensive daily exercise.
- D. Focus solely on timing of intercourse.
Correct Answer: B
Rationale: The correct answer is B: Maintain a healthy weight and avoid smoking. This recommendation is most appropriate because both factors significantly impact fertility. Being at a healthy weight improves hormonal balance and ovulation, while smoking can harm sperm quality and reduce fertility.
Explanation for why other choices are incorrect:
A: Increasing caffeine intake may negatively affect fertility, as high levels of caffeine have been linked to reduced fertility in both men and women.
C: Engaging in intensive daily exercise can actually disrupt menstrual cycles and ovulation, negatively impacting fertility.
D: Focusing solely on timing of intercourse overlooks the importance of overall lifestyle factors that can affect fertility, such as diet, weight, and smoking.
During preconception counseling, a patient asks about the impact of caffeine on fertility. What should the nurse emphasize?
- A. Moderate caffeine intake is generally considered safe.
- B. Caffeine improves ovulation and increases conception chances.
- C. All caffeine should be eliminated to conceive successfully.
- D. Caffeine intake only affects male fertility.
Correct Answer: A
Rationale: Correct Answer: A
Rationale:
1. Moderate caffeine intake is generally considered safe during preconception as excessive intake may affect fertility.
2. Studies show that moderate caffeine consumption doesn't significantly impact fertility.
3. Advising complete elimination may be overly restrictive and challenging for patients.
4. Caffeine can affect both male and female fertility, not just male fertility.
5. Emphasizing moderation allows for informed decision-making and realistic lifestyle changes.
Summary of other choices:
B: Incorrect - Caffeine does not improve ovulation or increase conception chances.
C: Incorrect - Complete elimination of caffeine is unnecessary for successful conception.
D: Incorrect - Caffeine intake can affect both male and female fertility, not limited to male fertility.
A nurse is instructing a woman on the use of ovulation predictor kits. What should the nurse tell the client?
- A. A prescription is required.
- B. The kit will determine a serum LH level.
- C. The LH surge usually occurs 12 hours prior to ovulation.
- D. Your interval of greatest fertility is on the day of the LH surge and the following 2 days.
Correct Answer: D
Rationale: The correct answer is D because the interval of greatest fertility is indeed on the day of the LH surge and the following 2 days, maximizing chances of conception. Choice A is incorrect as ovulation predictor kits are typically over-the-counter. Choice B is incorrect as the kit measures urinary LH, not serum. Choice C is incorrect as the LH surge usually occurs 24-36 hours before ovulation, not 12.