BACKGROUND: Micturition syncope is a relatively uncommon cause of sudden and temporary loss of consciousness. Most prevalent in older males, this condition is extremely rare in women. CASES: Two pregnant women presented with recurrent syncope. The syncopal events were more common in the early morning and were precipitated by the presence of a distended bladder, urinary urgency, assuming a standing position after either being supine or sitting, or associated with travel motion. Extensive neurology and cardiology evaluations were negative, and the events were considered consistent with micturition syncope. Both patients responded favorably to conservative voiding behavior modification measures throughout the remainder of pregnancy. CONCLUSION: Micturition syncope during pregnancy may not be a rare occurrence. This potentially dangerous condition is amenable to voiding behavior modification measures.
