What is the normal range for serum sodium during pregnancy?

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Enhance your preparation for the HESI Maternity Test. Study with flashcards and multiple choice questions, each with explanations. Get exam-ready now!

Multiple Choice

What is the normal range for serum sodium during pregnancy?

Explanation:
During pregnancy, the body adds a lot of fluid, but serum sodium stays in the same normal range seen in nonpregnant adults. The typical range is 135 to 145 mEq/L. This stability comes from the body's ability to regulate water balance through hormones like ADH and aldosterone and from kidney function that concentrates or dilutes urine to keep sodium concentration steady. If sodium falls below 135, that indicates hyponatremia and potential issues with excessive fluid or SIADH; if it rises above 145, that indicates hypernatremia and possible dehydration. So, the normal range for serum sodium in pregnancy is 135–145 mEq/L.

During pregnancy, the body adds a lot of fluid, but serum sodium stays in the same normal range seen in nonpregnant adults. The typical range is 135 to 145 mEq/L. This stability comes from the body's ability to regulate water balance through hormones like ADH and aldosterone and from kidney function that concentrates or dilutes urine to keep sodium concentration steady. If sodium falls below 135, that indicates hyponatremia and potential issues with excessive fluid or SIADH; if it rises above 145, that indicates hypernatremia and possible dehydration. So, the normal range for serum sodium in pregnancy is 135–145 mEq/L.

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