What should be monitored if the mother received magnesium sulfate during labor?

Monitoring electrolytes and ionized calcium is crucial when a mother receives magnesium sulfate during labor due to the medication's effects on the body. Magnesium sulfate is commonly used for its neuroprotective properties and to prevent seizures in conditions such as preeclampsia. Its administration can lead to elevated magnesium levels in the bloodstream, potentially causing hypermagnesemia, which may result in complications like respiratory depression and cardiac disturbances.

Additionally, magnesium sulfate can lead to decreased levels of calcium in the blood, as magnesium and calcium levels can interact closely in physiological processes. Monitoring ionized calcium levels specifically allows for the early detection of hypocalcemia, which could arise as a side effect of magnesium therapy. Thus, keeping an eye on these electrolytes is essential for ensuring maternal and fetal safety during labor when magnesium sulfate is used.