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Uptodate Reference Title
Risk of recurrent spontaneous preterm birth in a second pregnancy
Risk of recurrent spontaneous preterm birth in a second pregnancy
Risk of PTB in next pregnancy (%)
Risk of PTB before 28 weeks of gestation (%)
No prior PTB
9
0.23
Prior PTB
22
Prior PTB at 23 to 27 weeks
5
Prior PTB at 28 to 34 weeks
3
Prior PTB at 35 to 36 weeks
1
PTB: preterm birth.
Data from: Mercer BM, Goldenberg RL, Moawad AH, et al. The preterm prediction study: Effect of gestational age and cause of preterm birth on subsequent obstetric outcome. National Institute of Child Health and Human Development Maternal-Fetal Medicine Units Network. Am J Obstet Gynecol 1999; 181:1216.
