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
A 30-year-old lady develops retention of urine in the 2nd trimester. The most probable cause is: 
Select and explain. 
A. Fibroid uterus, B. Bladder neck obstruction due to ovarian cyst, C. Obstruction of uterus, D. Retroverted uterus
D: Retroverted uterus
Answer: D: Retroverted uterus 
Explanation: Ans. is d, i.e. Retroverted uterusRef Dutta Obs. 7/e, p 311, 312In the question:Both fibroid and retroverted uterus can cause acute retention of urine during early pregnancy.But retroverted uterus will be the more correct option as:-It is common during pregnancyoMost common time of occurrence of urinary retention is second trimester - 12 to 16 weeks.Also Know:Other causes of retention of urine in pregnancy:Early pregnancyDuring puerperiumDue to diminished bladder toneRetroverted uterusImpacted pelvic tumor