**Core Concept**
Clomiphene citrate is a selective estrogen receptor modulator (SERM) used in the treatment of infertility in women with polycystic ovary syndrome (PCOS) and other causes of anovulation. Its mechanism of action involves both estrogen receptor agonism and antagonism.

**Why the Correct Answer is Right**
Clomiphene acts as an estrogen receptor antagonist in the hypothalamus, which leads to an increase in gonadotropin-releasing hormone (GnRH) secretion. This, in turn, stimulates the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the anterior pituitary gland. The increased levels of FSH and LH stimulate follicular growth and ovulation. Clomiphene also has estrogen receptor agonist effects in the uterus and breasts, which helps to maintain the endometrium and prevent endometrial atrophy.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incomplete and does not provide a mechanism of action for clomiphene.
**Option B:** This option is incorrect because clomiphene does not directly stimulate the release of FSH and LH from the anterior pituitary gland.
**Option C:** This option is incorrect because while clomiphene does have estrogen receptor agonist effects in the uterus and breasts, this is not its primary mechanism of action in inducing ovulation.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that clomiphene citrate can cause a temporary increase in body temperature and a change in cervical mucus, which can be used as a surrogate marker for ovulation.

**Correct Answer: A is incorrect because the question is incomplete. However, the correct options should be A. Antagonism of estrogen receptors in the hypothalamus, B. Stimulation of gonadotropin-releasing hormone (GnRH) secretion, C. Stimulation of follicular growth and ovulation, and D. Maintenance of the endometrium.