Parvovirus B19 in pregnancy.

Pregnant women who report possible exposure to a viral illness can present a clinical predicament for obstetric providers. Although some viruses are benign in pregnancy, others can have serious consequences. Parvovirus B19, the causative agent of fifth disease, is one of the more serious of the common viruses. Understanding the pathophysiology and appropriate testing for parvovirus will help providers better counsel their patients.