**Core Concept**
Emergency contraception refers to the use of medications or devices to prevent pregnancy after unprotected sex or contraceptive failure. Various methods are available, including combined oral contraceptives, progestin-only pills, and copper IUDs. The effectiveness of these methods depends on the timing and type of contraceptive used.

**Why the Correct Answer is Right**
The correct answer is a medication that is not typically used as emergency contraception. **Levonorgestrel** (a progestin-only pill) and **ulipristal acetate** (an antiprogestin) are commonly used for emergency contraception due to their ability to prevent ovulation or fertilization. However, **tramadol** is an opioid analgesic used for pain management and is not indicated for emergency contraception.

**Why Each Wrong Option is Incorrect**
**Option A:** Not provided
**Option B:** Not provided
**Option C:** Not provided
**Option D:** Not provided

**Clinical Pearl / High-Yield Fact**
When considering emergency contraception, it is essential to remember that the most effective methods involve using a copper IUD within 5 days of unprotected sex, as it can prevent implantation of a fertilized egg.

**Correct Answer:** A. Tramadol is not used as emergency contraception.