**Core Concept**
Arias-Stella reaction is a histopathological change characterized by atypical glandular epithelial proliferation, typically occurring in response to hormonal influences, particularly estrogen. This phenomenon is often observed in the female genital tract, particularly in the endometrium and cervix.

**Why the Correct Answer is Right**
The Arias-Stella reaction is a reactive change that occurs in response to high levels of estrogen, which can be due to various factors such as pregnancy, choriocarcinoma, or the use of estrogen-containing contraceptives. The reaction is thought to be mediated by the trophic effect of estrogen on the glandular epithelium, leading to atypical cellular changes.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Arias-Stella reaction can indeed be seen in conditions associated with high estrogen levels, such as pregnancy. The reaction is a normal response to the hormonal changes that occur during pregnancy.

**Option B:** This option is incorrect because Arias-Stella reaction is not typically associated with progesterone-mediated changes. While progesterone does play a role in the female reproductive cycle, the Arias-Stella reaction is primarily driven by estrogen.

**Option C:** This option is incorrect because Arias-Stella reaction can be seen in conditions associated with high estrogen levels, such as choriocarcinoma. Choriocarcinoma is a type of germ cell tumor that produces high levels of human chorionic gonadotropin (hCG), which can stimulate the production of estrogen.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the Arias-Stella reaction is a reactive change and not a neoplastic process. This distinction is crucial for accurate diagnosis and management of patients with abnormal Pap smears or other gynecological complaints.

**Correct Answer: D. Progesterone-only contraceptives**