What is the purpose of intracytoplasmic sperm injection (ICSI) in IVF procedures?

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.

Correct Answer: B

Rationale: The correct answer is B because maintaining a healthy weight positively affects hormonal balance and sperm quality in both men and women, leading to improved fertility outcomes. This is supported by research showing the link between obesity and infertility. Choice A is incorrect as weight management does impact fertility. Choice C is incorrect as weight loss can benefit fertility in both genders. Choice D is incorrect as being underweight can actually negatively impact fertility in men.

Correct Answer: B

Rationale: The correct answer is B because tubal factor infertility is primarily due to blockages or damage in the fallopian tubes, which can prevent the egg from meeting the sperm for fertilization. Blockages can result from infections, surgeries, or conditions like endometriosis. Choices A, C, and D are incorrect because hormonal imbalances affecting the ovaries, previous infections or surgeries, and impacts on natural conception are not the primary causes of tubal factor infertility.

Correct Answer: B

Rationale: The correct answer is B because antioxidants can help reduce oxidative stress, which is beneficial for both egg and sperm quality in fertility. Antioxidants neutralize harmful free radicals, protecting reproductive cells from damage. Choice A is incorrect because antioxidants benefit both male and female fertility. Choice C is incorrect as antioxidants do not guarantee successful fertilization and implantation, but they can support the process. Choice D is incorrect as antioxidants do play a role in reproductive health by improving fertility outcomes.

Correct Answer: B

Rationale: The correct answer is B because maintaining a healthy weight and reducing stress can improve hormonal balance and ovulation, leading to increased fertility. Healthy lifestyle choices positively impact reproductive health by regulating menstrual cycles and promoting optimal conditions for conception. Eliminating all carbohydrates (choice C) is not necessary and can be harmful as the body needs a balanced diet. Exercise (choice D) plays a crucial role in supporting fertility by promoting overall health and reducing stress, contrary to the statement that exercise has no role in fertility. Choice A is incorrect as successful conception is not guaranteed within one cycle with lifestyle modifications.