**Core Concept**
In females with a family history of ovarian cancer, the preferred method of contraception should ideally reduce the risk of ovarian cancer or mimic the protective effects of pregnancy. This is due to the fact that some studies have shown that combined oral contraceptives (COCs) may lower the risk of ovarian cancer.

**Why the Correct Answer is Right**
Combined oral contraceptives (COCs) contain both estrogen and progesterone, which work together to reduce the risk of ovarian cancer. This protective effect is thought to be due to the suppression of gonadotropin secretion, resulting in reduced ovarian stimulation and subsequent risk of malignant transformation. COCs have been shown to decrease the risk of ovarian cancer by 30-50% in women with a family history of the disease.

**Why Each Wrong Option is Incorrect**
**Option A:** Progestin-only pills (POPs) do not have the same protective effect on ovarian cancer risk reduction as COCs. While they may still offer some benefits in terms of menstrual regulation and contraception, they are not the preferred choice for women with a family history of ovarian cancer.
**Option B:** Copper IUCDs (Cu IUCD) are effective as a form of contraception but do not have a demonstrated protective effect on ovarian cancer risk. They work by causing a local inflammatory response that prevents fertilization.
**Option D:** Barrier methods, such as condoms, are effective for preventing pregnancy but do not offer any protection against ovarian cancer.

**Clinical Pearl / High-Yield Fact**
Women with a family history of ovarian cancer should be counseled on the benefits of COCs in reducing ovarian cancer risk, and should be offered COCs as a first-line contraceptive option if they are not contraindicated.

**✓ Correct Answer: C. OCP**