According to the monitoring mnemonic for lithium, what should be checked in pregnancy?

Monitoring for lithium levels during pregnancy is particularly important because lithium has a narrow therapeutic window and can affect fetal development. Among the various factors that could be monitored, electrolytes are crucial. Lithium therapy can influence electrolyte balance, leading to conditions such as hyponatremia, which can be exacerbated by physiological changes in pregnancy.

As hormonal changes and increased blood volume occur during pregnancy, the renal clearance of lithium can also change, potentially affecting serum lithium levels. Therefore, regular monitoring of electrolytes helps ensure the safety and efficacy of lithium treatment for both the mother and the developing fetus. It is essential to maintain appropriate electrolyte levels to prevent potential complications associated with lithium therapy during this sensitive period.