ResearchObstetricsRisk for postterm delivery after previous postterm delivery
Section snippets
Study design
The Washington University School of Medicine Human Studies Committee approved a protocol for the analysis of the Missouri Department of Health’s maternally linked birth-death certificate database. All protected health information was removed before distribution. This database includes 1,577,082 live births or fetal deaths that occurred between 1978 and 1997, which include 257,064 (16.3%) black births and 1,297,938 (82.3%) white births. Analysis of a maternally linked database that contains live
Population demographics
The Missouri Department of Health maternally linked birth-death certificate database included 711,015 births between 1989 and 1997. The database was subdivided into 3 clinically defined gestational age categories: preterm (20-366/7 weeks of gestation), full-term (37-416/7 weeks of gestation), and postterm (42-456/7 weeks of gestation). The birth rates for each of these categories were 11.4%, 80.8%, and 7.4%, respectively. The relative risks between black and white births in each category were
Comment
In this study, we use epidemiologic methods to identify contributors to the timing for birth. Several studies have evaluated the likelihood of recurrence of preterm birth, but little evaluation has been reported on the recurrence of postterm birth.9, 19, 20, 25, 26 As with preterm birth, we found that a woman is more likely to experience postterm gestation if she has had a previous postterm birth. The quantification that we provided likely underestimates the incidence of recurrent postterm
Acknowledgment
We thank the Missouri Department of Health and Senior Services, Section of Public Health Practice and Administrative Support for allowing us to analyze this database. All of the analysis, interpretations, and conclusions derived from the database are those of the authors and not the Missouri Department of Health and Senior Services.
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2019, Yen & Jaffe's Reproductive Endocrinology: Physiology, Pathophysiology, and Clinical Management: Eighth EditionProlonged and Postterm Pregnancy
2016, Obstetrics: Normal and Problem PregnanciesTiming of induction of labor
2015, Seminars in PerinatologyCitation Excerpt :Early ultrasound examination for estimation of delivery date decreases the prevalence of post-term pregnancies.96 The etiology of post-term birth is not well understood, but risk factors include history of post-term pregnancy, obesity, nulliparity, and advanced maternal age.97,98 Fetal, neonatal, and maternal adverse outcomes increase when pregnancies continue beyond term.
Recurrence rate and outcome of postterm pregnancy, a national cohort study
2015, European Journal of Obstetrics and Gynecology and Reproductive BiologyCitation Excerpt :Factors known to influence length of pregnancy are paternal genetics, maternal height, obesity and male fetal gender [11–15]. Previous studies showed a high recurrence risk of postterm delivery [7,16–19]. The risk of adverse maternal or perinatal outcomes in a second, recurrent or de novo, postterm delivery is unknown.
Parturition
2015, Knobil and Neill's Physiology of Reproduction: Two-Volume Set
Supported by grants from the March of Dimes (Dr Muglia), Doris Duke Clinical Research Fellowship (Mr Kistka), and Howard Hughes Medical Institute (Ms Palomar).
Cite this article as: Kistka ZA-F, Palomar L, Boslaugh SE, DeBaun MR, DeFranco EA, Muglis LJ. Risk for postterm delivery after previous postterm delivery. Am J Obstet Gynecol 2007;196:241.e1-241.e6.