Patient presents with complaints consistent with possible hypokalemia during pregnancy.  Presenting symptoms include muscle weakness, fatigue, leg cramps, and constipation.  Patient reports decreased appetite and occasional palpitations.  Onset of symptoms began approximately two weeks ago and have gradually worsened.  Patient denies any vomiting or diarrhea.  Current gestational age is 28 weeks.  Past medical history includes gestational diabetes mellitus controlled with diet.  Family history is unremarkable for electrolyte disorders.  Physical examination reveals normal fetal heart tones and uterine size appropriate for gestational age.  Mild lower extremity edema noted.  Neurological exam demonstrates decreased deep tendon reflexes.  Electrocardiogram shows flattened T waves and the presence of U waves, suggestive of hypokalemia.  Laboratory results confirm hypokalemia with a serum potassium level of 3.1 mEqL.  Magnesium levels are within normal limits.  Diagnosis of hypokalemia in pregnancy established.  Differential diagnosis included magnesium deficiency, hyperemesis gravidarum, and diuretic use, which were ruled out based on patient history, physical exam, and laboratory findings.  Plan includes oral potassium chloride supplementation, dietary counseling emphasizing potassium-rich foods, and close monitoring of serum potassium levels with repeat laboratory testing in one week.  Patient education provided regarding signs and symptoms of hypokalemia and the importance of medication compliance.  Potential complications of hypokalemia during pregnancy, such as cardiac arrhythmias and premature labor, were discussed.  Follow-up appointment scheduled in one week to reassess symptoms and potassium levels.  ICD-10 code E87.6, hypokalemia, is documented.