**Core Concept**
Third-generation oral contraceptive pills (OCPs) are a class of hormonal contraceptives that contain progestins like norgestrel and gestodene, along with estrogens. These pills are designed to provide effective contraception while minimizing the risk of side effects associated with earlier generations of OCps.

**Why the Correct Answer is Right**
Third-generation OCps work by preventing ovulation through the action of progestins like norgestrel and gestodene, which inhibit the release of gonadotropin-releasing hormone (GnRH) from the hypothalamus. This ultimately leads to decreased production of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the pituitary gland. As a result, ovulation is suppressed, preventing the release of an egg from the ovary. The estrogen component of these pills helps to maintain the endometrial lining, making it inhospitable to implantation of a fertilized egg.

**Why Each Wrong Option is Incorrect**
**Option A:** This is not a correct answer as it does not provide any information about the mechanism of action of third-generation OCps.
**Option B:** This option might be tempting, but it is not the correct answer as it does not specifically address the progestin component of third-generation OCps.
**Option C:** This option is incorrect because it does not accurately describe the mechanism of action of third-generation OCps.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that third-generation OCps are more likely to cause changes in lipid profiles, such as increased levels of high-density lipoprotein (HDL) and decreased levels of low-density lipoprotein (LDL), compared to earlier generations of OCps.

**Correct Answer:** D.