This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiological changes during Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'The following changes occur in urinary system in pregnancy except \nSelect and explain. \nA. Increased GFR, B. Increased RBF, C. Hypertrophy of bladder musculature, D. Increased activity of ureters', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is d, i.e. Increased activity of uretersAs discussed previously, during pregnancy - Glomerular filtration rate and renal blood flow increases i.e. option a and b are correct. Amongst option c and d; option d i.e. increased activity of ureters cannot be correct as the main hormone during pregnancy is progesterone which leads to relaxation of the smooth muscles of ureter. Therefore activity of ureters decreases and leads to urinary stasis.Anatomical changes in renal system during pregnancy.Both kidneys enlarge in pregnancy 1 cm.Hydroureter and hydronephrosis occurs due to relaxant effect progesterone (These changes are M/c on right side).Congestion of bladder leading to decreased bladder capacity.To compensate bladder pressure increases and intraurethral pressure increases.', 'role': 'assistant'}]