ACOG Practice Bulletin No. 207 Summary: Thrombocytopenia in Pregnancy

Obstetrics and Gynecology

Abstract

Obstetricians frequently diagnose thrombocytopenia in pregnant women because platelet counts are included with automated complete blood cell counts obtained during routine prenatal screening (1). Although most U.S. health care providers are trained using U.S. Conventional Units, most scientists, journals, and countries use Système International (SI) units. The laboratory results reported in U.S. Conventional Units can be converted to SI Units or vice versa by using a conversion factor. Given the conversion factor is 1.0, when converting from 10/μL to 10/L the platelet "count" does not seemingly change. Thrombocytopenia, defined as a platelet count of less than 150 x 10/L, is common and occurs in 7-12% of pregnancies at the time of delivery (2, 3). Thrombocytopenia can result from a variety of physiologic or pathologic conditions, several of which are unique to pregnancy. Some causes of thrombocytopenia are serious medical disorders that have the potential for maternal and fetal morbidity. In contrast, other conditions, such as gestational thrombocytopenia, are benign and pose no maternal or fetal risks. Because of the increased recognition of maternal and fetal thrombocytopenia, there are numerous controversies about obstetric ...Continue Reading

References

Nov 11, 1993·The New England Journal of Medicine·R F Burrows, J G Kelton
Nov 26, 2009·Obstetrics and Gynecology·Mina Abbassi-GhanavatiF Gary Cunningham

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Obstetrics and Gynecology
American College of Obstetricians and Gynecologists’ Committee on Practice Bulletins—Obstetrics
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R F Burrows, J G Kelton
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