Maternal Newborn Nursing Practice Questions Related

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What emergency contraception has the best efficacy for prevention of pregnancy?

  • A. Plan B
  • B. Yuzpe
  • C. copper IUC
  • D. progesterone-only EC
Correct Answer: C

Rationale: Copper intrauterine devices (IUDs) have the best efficacy for prevention of pregnancy among emergency contraception options. Copper IUDs are over 99% effective when used as emergency contraception, making them more reliable than other methods like Plan B, Yuzpe, or progesterone-only EC. This high efficacy is due to the mechanism of action of copper IUDs, which prevent fertilization and implantation of the fertilized egg. Additionally, once inserted, a copper IUD can continue to provide ongoing contraception for up to 10 years, making it a long-term contraceptive option as well.