1. American College of Obstetricians and Gynecologists ACOG Washington, DC 2000
2. Risks associated with human parvovirus B19 infection;Centers for Disease Control;MMWR,1989
3. Noninvasive diagnosis by Doppler ultrasonography of fetal anemia resulting from parvovirus infection;Cosmi;Am J Obstet Gynecol,2002
4. Noninvasive techniques to detect fetal anemia due to red blood cell alloimmunization: a systematic review;Divakaran;Obstet Gynecol,2001
5. The infectious origins of stillbirth;Goldenberg;Am J Obstet Gynecol,2003