| Persistence of placenta previa according to gestational age at ultrasound detection. | |
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MedLine Citation:
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PMID: 11978274 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To evaluate gestational age at ultrasound detection of placenta previa as a predictor of previa persistence until delivery, and to estimate the effects of previa type, parity, and prior cesarean delivery on previa persistence. METHODS: This was a retrospective cohort study of pregnancies with placenta previa detected during transabdominal or endovaginal ultrasound examination. Previa was categorized as complete if the placenta completely covered the internal cervical os or incomplete if the inferior placental edge partially covered or reached the margin of the os. Gestational age was grouped into 4-week intervals from 15 to 36 weeks. The outcome was cesarean delivery for persistent previa. RESULTS: Previa was detected during 940 ultrasound examinations in 714 pregnancies. Of those with placenta previa at 15-19 weeks, 20-23 weeks, 24-27 weeks, 28-31 weeks, and 32-35 weeks, previa persisted until delivery in 12%, 34%, 49%, 62%, and 73%, respectively. At each interval, complete previa was more likely to persist than incomplete previa, all P <.001. Prior cesarean delivery was an independent risk factor for persistent previa among women diagnosed with previa in the second trimester, P <.05. However, parity was not an independent risk factor for persistence at any gestational age interval after adjusting for prior cesarean delivery. CONCLUSION: Gestational age at ultrasound detection of placenta previa may be used to predict likelihood of previa persistence. After midpregnancy, risk of persistence appears to be higher than previously reported. Type of placentation and prior cesarean delivery are important factors that modify the risk that previa will complicate delivery. |
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Authors:
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Jodi S Dashe; Donald D McIntire; Ronald M Ramus; Rigoberto Santos-Ramos; Diane M Twickler |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Obstetrics and gynecology Volume: 99 ISSN: 0029-7844 ISO Abbreviation: Obstet Gynecol Publication Date: 2002 May |
Date Detail:
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Created Date: 2002-04-29 Completed Date: 2002-09-19 Revised Date: 2009-10-26 |
Medline Journal Info:
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Nlm Unique ID: 0401101 Medline TA: Obstet Gynecol Country: United States |
Other Details:
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Languages: eng Pagination: 692-7 Citation Subset: AIM; IM |
Affiliation:
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Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, Texas, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Cesarean Section Cohort Studies Female Gestational Age Humans Parity Placenta Previa / ultrasonography* Pregnancy Prognosis Retrospective Studies Risk Factors |
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