The nurse is educating an adolescent patient about Depo-Provera. Which statement should be included in this teaching session?

Correct Answer: C

Rationale: Depo-Provera can cause irregular bleeding patterns, including spotting or no bleeding at all. Choice A is incorrect because Depo-Provera needs to be administered every 3 months, not every 5 months. Choice B is incorrect as weight gain is more commonly associated with Depo-Provera, not weight loss. Choice D is incorrect as Depo-Provera can be used regardless of whether the woman has been pregnant before.

Correct Answer: B

Rationale: Birth control pills primarily work by preventing ovulation, thereby inhibiting the release of eggs for fertilization. Choice A is incorrect because birth control pills do not directly block sperm; they prevent ovulation. Choice C is partially correct but is not the main mechanism, as the primary function is to prevent ovulation. Choice D is incorrect because birth control pills do not alter the size of reproductive organs.

Correct Answer: A

Rationale: Emergency contraception is most effective when taken within 72 hours of unprotected sex. Choice B is incorrect as it is not as effective after 5 days. Choice C is incorrect because emergency contraception works primarily by preventing ovulation, not by preventing implantation. Choice D is incorrect because most emergency contraception methods are available over the counter.

Correct Answer: B

Rationale: Irregular bleeding, including spotting, is a common side effect of the contraceptive implant. Choice A is incorrect because the implant typically leads to lighter periods or no periods at all. Choice C is incorrect as weight gain is not a guaranteed side effect, though some women report it. Choice D is incorrect because hair loss is not commonly associated with the implant.

Correct Answer: A

Rationale: One of the primary advantages of the IUD is that it requires no daily action, making it a convenient and reliable method. Choice B is incorrect because it may take a few days for some types of IUDs to provide full protection. Choice C is incorrect because immediate protection may not be ensured immediately after insertion, especially for hormonal IUDs. Choice D is incorrect because IUDs typically last for several years, not just 6 months.