Condition of endometrium growing outside the uterus.

• A. Endometrium
• B. Endocrinopathy
• C. Endocarditis
• D. Endometriosis

Answer: (D)

Endometriosis is the condition where endometrial-like tissue is located outside the uterus. This tissue behaves like the uterine lining, responding to hormonal cycles and can bleed in places such as the pelvic peritoneum or ovaries. The resulting cyclic inflammation and formation of scar tissue explain the characteristic pelvic pain, painful periods, and potential infertility. In contrast, the endometrium is simply the normal lining inside the uterus, endocrine disorders affect hormone balance without ectopic tissue growth, and endocarditis is an infection of the heart valves.