**Question:** A pregnant woman presents with red degeneration of myoma. The management is

A. Oral contraceptives
B. Hysterectomy
C. GnRH agonists
D. Radical surgery

**Correct Answer:** **C. GnRH agonists**

**Core Concept:**
Red degeneration of uterine myoma is a complication of pregnancy, characterized by pain, tenderness, and bleeding from the fibroids due to hormonal changes. In this scenario, the underlying mechanism involves the effect of pregnancy hormones on uterine myomas, leading to their enlargement and increased vascularity.

**Why the Correct Answer is Right:**
In the context of a pregnant woman, GnRH (Gonadotropin-Releasing Hormone) agonists are considered a suitable choice for managing red degeneration of myoma. GnRH agonists, such as leuprolide and goserelin, work by suppressing the production of gonadotropins (FSH and LH) in the pituitary gland, leading to a decrease in estrogen and progesterone levels. This results in a reduction in uterine myoma growth and blood supply, alleviating the pain, tenderness, and bleeding associated with red degeneration.

**Why Each Wrong Option is Incorrect:**

A. Oral contraceptives (e.g., progestogens): Although oral contraceptives can be effective in preventing menstrual bleeding, they are not indicated for managing red degeneration of myoma, as they do not address the primary cause, which is the hormonal changes during pregnancy.

B. Hysterectomy (radical surgery): While this option may provide a definitive solution for the patient, it is an invasive procedure with potential complications, including blood loss, anesthesia risks, and post-operative recovery time. Selective use of conservative management is preferred before resorting to radical surgery.

C. GnRH antagonists: GnRH antagonists, like cetrorelix, compete with GnRH agonists at the GnRH receptor, preventing the activation of the downstream GnRH pathway. However, GnRH antagonists may not be as effective as agonists in suppressing gonadotropins and reducing uterine myoma growth.

D. Radiotherapy: Radiotherapy is an alternative treatment option for uterine fibroids, but it is not specifically targeted at the hormonal changes during pregnancy and may not provide relief for the red degeneration symptomatology. Furthermore, radiotherapy comes with potential side effects, including radiation exposure to surrounding tissues and increased risk of secondary malignancy.

**Clinical Pearl:**

In cases where conservative management is chosen, GnRH agonists like GnRH agonists are generally preferred over GnRH antagonists, as they have been proven to have a more potent effect on gonadotropin suppression and uterine myoma regression.

**Why the Correct Answer is Right:**

Gonadotropin-releasing hormone (GnRH) agonists, such as leuprol