What is considered the most effective form of emergency contraception?

Prepare for the Reproductive Physician Assistant National Certifying Examination (PANCE). Utilize flashcards and multiple choice questions, complete with hints and explanations, to confidently approach your exam.

Ulipristal acetate (Ella) is recognized as the most effective form of emergency contraception, particularly when taken within 120 hours (5 days) following unprotected intercourse. It acts as a selective progesterone receptor modulator, delaying or inhibiting ovulation, which is key to preventing pregnancy after unprotected sex.

While Levonorgestrel (Plan B) is a widely used form of emergency contraception, it is most effective when taken within 72 hours after intercourse and is less effective in individuals with a higher body mass index (BMI). In contrast, ulipristal acetate maintains efficacy regardless of the timing within that 120-hour window, thereby offering a more reliable option for emergency contraception in various situations.

The Copper Intrauterine Device (IUD) is also an effective emergency contraceptive method and can be inserted within 5 days after unprotected intercourse. However, it is not as commonly used due to the need for a clinical appointment for insertion, whereas ulipristal can be taken orally without the need for medical intervention.

Combined oral contraceptives are not typically recommended as a first-line method for emergency contraception due to their less favorable efficacy profile and the complexity of dosing required when used in this context.

Understanding

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