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Maternal lithium therapy and polyhydramnios.

M S Ang1, J A Thorp, V M Parisi

  • 1Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Texas Medical School, Houston.

Obstetrics and Gynecology
|September 1, 1990
PubMed
Summary
This summary is machine-generated.

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Lithium use during pregnancy can cause fetal polyuria, leading to polyhydramnios. This study suggests lithium

Area of Science:

  • Obstetrics and Gynecology
  • Pharmacology
  • Neonatology

Background:

  • Lithium is a first-line treatment for bipolar disorder.
  • Lithium exposure in utero is associated with teratogenic effects, including cardiovascular abnormalities like Ebstein anomaly.
  • A common side effect of lithium in patients is polyuria, a manifestation of nephrogenic diabetes insipidus.

Observation:

  • A pregnant patient with bipolar disorder on lithium therapy developed polyhydramnios in her third trimester.
  • Polyhydramnios is characterized by excessive amniotic fluid accumulation.

Findings:

  • Lithium readily crosses the placenta.
  • The study postulates that lithium may induce fetal polyuria through a mechanism similar to that causing maternal polyuria.

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  • Fetal polyuria is proposed as the cause of polyhydramnios observed in this case.

    • Implications:

    • This finding suggests a potential mechanism for lithium-induced polyhydramnios.
    • Clinicians should be aware of the potential for fetal polyuria and polyhydramnios in pregnancies exposed to lithium.
    • Further research is warranted to confirm this association and explore management strategies.