Yuzpe method is used for which of these contraceptive techniques?
**Core Concept**
The Yuzpe method refers to a form of emergency contraception that involves the use of high doses of combined oral contraceptives (COCs) to prevent ovulation and fertilization. This method is based on the concept of using a high dose of estrogen and progestin to suppress ovulation and prevent implantation of a fertilized egg.
**Why the Correct Answer is Right**
The Yuzpe method works by using a combination of ethinyl estradiol and levonorgestrel to suppress ovulation and prevent fertilization. The high dose of estrogen and progestin in the COCs used for the Yuzpe method can delay or prevent ovulation, thereby preventing fertilization from occurring. This method is most effective when used within 72 hours of unprotected sex.
**Why Each Wrong Option is Incorrect**
**Option A:** The copper IUD is a different form of emergency contraception that works by releasing copper ions, which are toxic to sperm and prevent fertilization.
**Option B:** The FSH receptor antagonist is a different type of contraceptive that works by blocking the action of follicle-stimulating hormone (FSH) on the ovaries, thereby preventing ovulation.
**Option C:** The progesterone-only pill is a form of regular contraception that works by thickening cervical mucus and altering the uterine lining to prevent implantation of a fertilized egg.
**Clinical Pearl / High-Yield Fact**
It's essential to note that the Yuzpe method is not as effective as other forms of emergency contraception, such as the copper IUD or ulipristal acetate, and should only be used when other options are not available.
**Correct Answer:** C.