A 32-Year-Old Primigravida at 16 Weeks Gestation Comes to the Office

A 32-year-old primigravida at 16 weeks gestation comes to the office due to urinary frequency and increased thirst.  Although she limits fluids before bed, she still urinates 6-8 times a night.  The patient previously had intermittent urinary frequency, but symptoms have worsened since she became pregnant.  Family history is significant for type 2 diabetes mellitus in her mother and father.  Vital signs are within normal limits.  Examination shows no abnormalities.  Laboratory results are as follows: A 24-hour urine collection shows a urine output of 5.5 L after an intake of 2 L.  What is the most likely cause of this patient's urinary frequency?

A) Diabetes insipidus
B) Gestational diabetes mellitus
C) Normal pregnancy changes
D) Osmotic diuresis due to urea
E) Urinary tract infection

Correct Answer:

Verified

Unlock this answer now
Get Access to more Verified Answers free of charge

Access For Free