What symptoms may develop if a functional ovarian cyst undergoes rupture?

When a functional ovarian cyst ruptures, it often leads to unilateral lower quadrant pain, which is significant for several reasons. The rupture can cause irritation of the surrounding structures within the pelvis, leading to localized pain that is typically felt on the side of the affected ovary. This pain may be acute and sharp, allowing for accurate localization.

Additionally, abnormal uterine bleeding (AUB) can occur as a result of the hormonal changes triggered by the cyst or the rupture itself. Functional cysts are related to the menstrual cycle and can affect estrogen and progesterone levels in the body, which can lead to menstrual irregularities and bleeding patterns that may become heavier or more unpredictable.

The other choices are not commonly associated with the rupture of a functional ovarian cyst. Painful urination and fever would suggest a urinary tract infection or another infectious process rather than cyst rupture. Severe abdominal distension typically points more towards gastrointestinal issues or other pathological conditions and not directly to a ruptured cyst. Heavy menstrual bleeding and fatigue could occur due to different reasons but aren't specifically linked to the immediate effects of a ruptured functional ovarian cyst. Thus, the combination of unilateral lower quadrant pain and abnormal uterine bleeding accurately reflects the symptoms that may develop following a rupture, supporting the selection