This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological Disorders in Obs., Subject name: Gynaecology & Obstetrics
Causes of unilateral dysmenorrhea are all except: 
Select and explain. 
A. Rudimentary horn, B. Right ovarian vein syndrome, C. Unicornuate uterus, D. Large fundal fibroid
D: Large fundal fibroid
Answer: D: Large fundal fibroid 
Explanation: Ans. is 'd' i.e., Large fundal fibroid * Causes of unilateral dysmenorrhea1) Ovarian Dysmenorrhea (Right ovarian vein syndrome)2) Bicornuate uterus3) Unicornuate uterus4) Rudimentary horn5) Unilateral pelvic endometriosis6) Small fibroid polyp near one cornu