**Side Effects of Clomiphene Citrate**

**Core Concept**
Clomiphene citrate is a selective estrogen receptor modulator (SERM) used for ovulation induction in females with anovulatory infertility. It works by competitively binding to estrogen receptors in the hypothalamus, which leads to an increase in gonadotropin-releasing hormone (GnRH) secretion, resulting in increased follicle-stimulating hormone (FSH) and luteinizing hormone (LH) release.

**Why the Correct Answer is Right**
The correct answer is a side effect of clomiphene citrate, which is a common medication used for fertility treatment. Clomiphene citrate can cause a range of side effects, including hot flashes, mood changes, and changes in breast tissue. The medication can also cause visual disturbances, such as blurred vision or double vision, due to its effect on estrogen receptors in the retina.

**Why Each Wrong Option is Incorrect**
* **Option A:** Oligospermia is actually a side effect of testosterone therapy or other androgen-related treatments, not clomiphene citrate.
* **Option B:** Abdominal pain is a possible side effect of clomiphene citrate, as it can cause ovarian enlargement and discomfort.
* **Option C:** Weight gain is not a commonly reported side effect of clomiphene citrate; in fact, it can sometimes cause weight loss due to its effect on metabolism.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that clomiphene citrate can cause changes in breast tissue, including gynecomastia in males, due to its estrogenic effects on breast tissue.

**Correct Answer:** D. Oligospermia