ArticleThe Australian & New Zealand journal of obstetrics & gynaecology2022
Prior term delivery increases risk of subsequent recurrent preterm birth: An unexpected finding.
Article in The Australian & New Zealand journal of obstetrics & gynaecology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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Who cites it
3 citing papers in PubMed, 4 citations in OpenAlex.
- The role of poverty-related social determinants in maternal and perinatal health inequities: a cross-sectional study using the eLIXIR born in South London, UK maternity-child data linkage.International journal for equity in health · 2026Article
- Impact of Sociodemographic, Clinical, and Genetic Factors andIranian journal of medical sciences · 2025Article
- Socioeconomic determinants of preterm birth: a prospective multicenter hospital-based cohort study among a sample of Kazakhstan.BMC pregnancy and childbirth · 2024Article
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Authors and funding
6 authors at 3 institutions in 2 countries.
Funding
Abstract
backgroundWomen with a prior pregnancy at term are generally considered to be at reduced risk for subsequent spontaneous preterm birth (sPTB), whereas a previous sPTB is a major predictor for a future sPTB.
aimsThe objective of this study was to investigate the risk of recurrent sPTB in women with a prior term birth and a subsequent sPTB. MATERIALS AND
methodsThis is a retrospective cohort study conducted at St Thomas' Hospital in London, UK. There were 430 women included: 230 with a term birth (caesarean section or vaginal delivery) preceding a sPTB (term + sPTB group) and 200 with a prior sPTB only (sPTB only group). The primary outcome was sPTB, <37 weeks gestation.
resultsOf the term + sPTB group, 38.7% (89/230) had a recurrent sPTB compared to 20% (40/200) in the sPTB only group (P < 0.0001), with a relative risk (RR) of 1.9. Of women who had a term caesarean section and a subsequent PTB, 50% (30/60) had a further sPTB (RR 2.5 compared to the sPTB only group), while 34.7% (59/170) of women who had a term vaginal birth and subsequent sPTB, had a further sPTB (RR 1.7 compared to the sPTB only group).
conclusionIn women who have had a previous sPTB, the risk of a recurrence is much higher than in women with a prior term birth. The aetiology of PTB may be different in this subgroup of women and needs to be further elucidated to determine how best to identify and treat them.
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