Risk of preterm birth after prior term cesarean.
Ontology highlight
ABSTRACT: Objective
To determine the risk of overall preterm birth (PTB) and spontaneous PTB in a pregnancy after a caesarean section (CS) at term.Design
Longitudinal linked national cohort study.Setting
The Dutch Perinatal Registry (1999-2009).Population
268 495 women with two subsequent singleton pregnancies were identified.Methods
A cohort study based on linked registered data from two subsequent pregnancies in the Netherlands.Main outcome measures
The incidence of overall PTB and spontaneous PTB with subgroup analysis on gestational age at first delivery and type of CS (planned or unplanned).Results
Of 268 495 women with a singleton first pregnancy who delivered at term, 15.76% (n = 42 328) had a CS. The incidence of PTB in the second pregnancy was 2.79% (n = 1182) in women with a previous CS versus 2.46% (n = 5570) in women with a previous vaginal delivery (adjusted odds ratio [aOR] 1.14, 95% confidence interval [CI] 1.07-1.21). This increased risk is mainly driven by an increased risk of spontaneous PTB after previous CS at term (aOR 1.50, 95% CI 1.38-1.70). Analysis for type of CS compared with vaginal delivery showed an aOR on spontaneous PTB of 1.86 (95% CI 1.58-2.18) for planned CS and an aOR of 1.40 (95% CI 1.24-1.58) for unplanned CS.Conclusions
CS at term is associated with a marginally increased risk of spontaneous PTB in a subsequent pregnancy.Tweetable abstract
Caesarean section at term is associated with a marginally increased risk of spontaneous PTB in a subsequent pregnancy.
SUBMITTER: Visser L
PROVIDER: S-EPMC7317970 | biostudies-literature | 2020 Apr
REPOSITORIES: biostudies-literature
Publications
Risk of preterm birth after prior term cesarean.
Visser L L Slaager C C Kazemier B M BM Rietveld A L AL Oudijk M A MA de Groot Cjm C Mol B W BW de Boer M A MA
BJOG : an international journal of obstetrics and gynaecology 20200224 5
<h4>Objective</h4>To determine the risk of overall preterm birth (PTB) and spontaneous PTB in a pregnancy after a caesarean section (CS) at term.<h4>Design</h4>Longitudinal linked national cohort study.<h4>Setting</h4>The Dutch Perinatal Registry (1999-2009).<h4>Population</h4>268 495 women with two subsequent singleton pregnancies were identified.<h4>Methods</h4>A cohort study based on linked registered data from two subsequent pregnancies in the Netherlands.<h4>Main outcome measures</h4>The in ...[more]
Similar Datasets
Project description:ObjectiveThe objective of this study was to assess the presence of newly acquired preterm birth (PTB) risk factors among primiparous women with no prior history of PTB.DesignCase-control study.SettingDeliveries occurring within a large healthcare system from 2002 to 2012.PopulationWomen with their first two consecutive pregnancies carried to ≥20(0/7) weeks' gestation.MethodsThose delivering the first pregnancy at term and the second preterm ≥20(0/7) and <37(0/7) weeks (term-preterm cases) were compared with women with a term birth in their first two pregnancies (term-term controls). Social factors with the potential to change between the first and second pregnancies and intrapartum labour characteristics in the first pregnancy were compared between cases and controls.Main outcome measuresRisk factors for term-preterm sequence.ResultsAbout 38 215 women met inclusion criteria; 1353 (3.8%) were term-preterm cases. Cases and controls were similar with regard to race/ethnicity and maternal age at the time of the first and second deliveries. Cases delivered their second pregnancy approximately 3 weeks earlier (35.7 versus 39.1, P < 0.001). In multivariable models accounting for known PTB risk factors, women with a caesarean delivery in the first pregnancy [adjusted odds ratio (aOR) = 2.20; 95% confidence interval (CI) 1.57-3.08], new tobacco use (aOR = 2.33; 95% CI 1.61-3.38), and an interpregnancy interval <18 months (aOR = 1.37; 95% CI 1.21-1.55) were at increased risk of term-preterm sequence.ConclusionCaesarean delivery in the first pregnancy, new tobacco use, and short interpregnancy interval <18 months are significant risk factors for term-preterm sequence. Women should receive postpartum counselling regarding appropriate interpregnancy interval and cessation of tobacco use.Tweetable abstractCaesarean delivery in the 1st pregnancy is a significant risk factor for preterm birth following a term delivery.
| S-EPMC4809794 | biostudies-literature
Project description:ImportancePreterm birth (PTB) is a leading cause of neonatal mortality. However, evidence on mortality beyond the neonatal period is limited, especially in North America.ObjectiveTo examine associations of PTB with all-cause and cause-specific mortality from birth through 23 to 36 years of age.Design, setting, and participantsThis population-based matched cohort study of live births in Canada included individuals born between January 1, 1983, and December 31, 1996, and followed up until December 31, 2019. Data were analyzed from June 1, 2023, to April 30, 2024.ExposurePTBs, between 24 and 37 weeks' gestation (with gestational age [GA]-specific subcategories of 24 to 27 weeks, 28 to 31 weeks, 32 to 33 weeks, and 34 to 36 weeks) compared with term births (37-41 weeks' gestation).Main outcomes and measuresAll-cause mortality and cause-specific mortality were the main outcomes. Risk differences (RDs) and risk ratios (RRs) were estimated for all-cause mortality using log-binomial regressions and hazard ratios were estimated for cause-specific mortality using Cox proportional hazards regression models (censoring individuals who died from other causes) within prespecified age intervals (ages 0-11 months and ages 1-5, 6-12, 13-17, 18-28, and 29-36 years). Observed confounding was accounted for using coarsened exact matching on baseline characteristics.ResultsOf 4 998 560 births (54.2% male), 6.9% were born preterm (with GA-specific subcategories of 0.3% born at 24-27 weeks, 0.6% at 28-31 weeks, 0.8% at 32-33 weeks, and 5.1% at 34-36 weeks). During a median of 29 years of follow-up, 72 662 individuals died (14 312 born preterm and 58 350 at term). PTB was associated with an increased risk of death in all age intervals, with the highest RDs and RRs from birth through infancy (ages 0-11 months) (RD, 2.29% [95% CI, 2.23%-2.35%]; RR, 11.61 [95% CI, 11.09-12.15]) and in early childhood (ages 1-5 years) (RD, 0.34% [95% CI, 0.31%-0.36%]; RR, 2.79 [95% CI, 2.61-2.98]) and the lowest RDs and RRs among those between ages 18 and 28 years (RD, 0.07% [95% CI, 0.04%-0.10%]; RR, 1.13 [95% CI, 1.07-1.19]). We identified increased risks of mortality associated with several causes, including respiratory, circulatory, and digestive system disorders; nervous system, endocrine, and infectious diseases; cancers; congenital malformations; and conditions originating in the perinatal period. No associations were found for external causes of deaths. Associations by GA categories suggested lower risks with higher GA.Conclusions and relevanceThe findings of this population-based matched cohort study suggest that individuals born preterm were at an increased risk of death from birth until their third and fourth decades of life, with higher risks as GA decreased. Some of these associations may have been partly due to underlying health determinants that affected PTB and mortality. These findings suggest that PTB should be recognized as a risk factor for mortality and could inform preventive strategies.
| S-EPMC11579792 | biostudies-literature
Project description:ObjectivesPreterm birth has been linked with increased risk of autism spectrum disorder (ASD); however, potential causality, sex-specific differences, and association with early term birth are unclear. We examined whether preterm and early term birth are associated with ASD in a large population-based cohort.MethodsA national cohort study was conducted of all 4 061 795 singleton infants born in Sweden during 1973-2013 who survived to age 1 year, who were followed-up for ASD identified from nationwide outpatient and inpatient diagnoses through 2015. Poisson regression was used to determine prevalence ratios for ASD associated with gestational age at birth, adjusting for confounders. Cosibling analyses were used to assess the influence of unmeasured shared familial (genetic and/or environmental) factors.ResultsASD prevalences by gestational age at birth were 6.1% for extremely preterm (22-27 weeks), 2.6% for very to moderate preterm (28-33 weeks), 1.9% for late preterm (34-36 weeks), 2.1% for all preterm (<37 weeks), 1.6% for early term (37-38 weeks), and 1.4% for term (39-41 weeks). The adjusted prevalence ratios comparing extremely preterm, all preterm, or early term versus term, respectively, were 3.72 (95% confidence interval, 3.27-4.23), 1.35 (1.30-1.40), and 1.11 (1.08-1.13) among boys and 4.19 (3.45-5.09), 1.53 (1.45-1.62), and 1.16 (1.12-1.20) among girls (P < .001 for each). These associations were only slightly attenuated after controlling for shared familial factors.ConclusionsIn this national cohort, preterm and early term birth were associated with increased risk of ASD in boys and girls. These associations were largely independent of covariates and shared familial factors, consistent with a potential causal relationship.
| S-EPMC9809198 | biostudies-literature
Project description:Hundreds of naturally occurring milk peptides have been found in term human milk. Whether there are differences between the levels of these peptides between term and preterm milk remains unknown. Premature milk is produced before complete maturation of the mammary gland and is under the influence of a different hormonal milieu, which could change enzymatic activity and protein expression within the mammary gland and result in an altered peptide profile. We employed nano-liquid chromatography tandem mass spectrometry to identify naturally occurring peptides in term and premature milks at multiple time-points across lactation and compare the abundances of these peptides. We found that preterm milks produced more unique peptide sequences than term milks on average (359 vs. 286). The peptides identified were searched for overlapping sequences with an in-house database of known functional peptides. Specifically, we found that both term and preterm milks contain peptides overlapping with known sequences with antimicrobial, opioid antagonist and immunomodulatory actions. We also compared the enzymes involved in degradation of both milks via bioinformatic analysis. This analysis reveals that plasmin is more active in preterm milk than term milk.
2016-07-07 | PXD001079 | Pride
Project description:OBJECTIVE:To explore conditions and outcomes of a first delivery at term that might predict later preterm birth. DESIGN:Population based, prospective register based study. SETTING:Medical Birth Registry of Norway, 1999-2015. PARTICIPANTS:302 192 women giving birth (live or stillbirth) to a second singleton child between 1999 and 2015. MAIN OUTCOME MEASURES:Main outcome was the relative risk of preterm delivery (<37 gestational weeks) in the birth after a term first birth with pregnancy complications: pre-eclampsia, placental abruption, stillbirth, neonatal death, and small for gestational age. RESULTS:Women with any of the five complications at term showed a substantially increased risk of preterm delivery in the next pregnancy. The absolute risks for preterm delivery in a second pregnancy were 3.1% with none of the five term complications (8202/265 043), 6.1% after term pre-eclampsia (688/11 225), 7.3% after term placental abruption (41/562), 13.1% after term stillbirth (72/551), 10.0% after term neonatal death (22/219), and 6.7% after term small for gestational age (463/6939). The unadjusted relative risk for preterm birth after term pre-eclampsia was 2.0 (95% confidence interval 1.8 to 2.1), after term placental abruption was 2.3 (1.7 to 3.1), after term stillbirth was 4.2 (3.4 to 5.2), after term neonatal death was 3.2 (2.2 to 4.8), and after term small for gestational age was 2.2 (2.0 to 2.4). On average, the risk of preterm birth was increased 2.0-fold (1.9-fold to 2.1-fold) with one term complication in the first pregnancy, and 3.5-fold (2.9-fold to 4.2-fold) with two or more complications. The associations persisted after excluding recurrence of the specific complication in the second pregnancy. These links between term complications and preterm delivery were also seen in the reverse direction: preterm birth in the first pregnancy predicted complications in second pregnancies delivered at term. CONCLUSIONS:Pre-eclampsia, placental abruption, stillbirth, neonatal death, or small for gestational age experienced in a first term pregnancy are associated with a substantially increased risk of subsequent preterm delivery. Term complications seem to share important underlying causes with preterm delivery that persist from pregnancy to pregnancy, perhaps related to a mother's predisposition to disorders of placental function.
| S-EPMC7188013 | biostudies-literature
Project description:ObjectiveTo examine recurrent preterm birth and early term birth in women's initial and immediately subsequent pregnancies.MethodsThis retrospective cohort study included 163,889 women who delivered their first and second liveborn singleton neonates between 20 and 44 weeks of gestation in California from 2005 through 2011. Data from hospital discharge records and birth certificates were used for analyses. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using logistic regression models adjusted for risk factors.ResultsShorter gestational duration in the first pregnancy increased the risk of subsequent preterm birth (both early, before 32 weeks of gestation, and later, from 32 to 36 weeks of gestation) as well as early term birth (37-38 weeks of gestation). Compared with women with a prior term birth, women with a prior early preterm birth (before 32 weeks of gestation) were at the highest risk for a subsequent early preterm birth (58/935 [6.2%] compared with 367/118,505 [0.3%], adjusted OR 23.3, 95% CI 17.2-31.7). Women with a prior early term birth had more than a twofold increased risk for subsequent preterm birth (before 32 weeks of gestation: 171/36,017 [0.5%], adjusted OR 2.0, 95% CI 1.6-2.3; from 32 to 36 weeks of gestation: 2,086/36,017 [6.8%], adjusted OR 3.0, 95% CI 2.9-3.2) or early term birth (13,582/36,017 [37.7%], adjusted OR 2.2, 95% CI 2.2-2.3).ConclusionBoth preterm birth and early term birth are associated with these outcomes in a subsequent pregnancy. Increased clinical attention and research efforts may benefit from a focus on women with a prior early term birth as well as those with prior preterm birth.
| S-EPMC5055875 | biostudies-literature
Project description:The current study tested whether the reported lower wellbeing of parents after preterm birth, relative to term birth, is a continuation of a pre-existing difference before pregnancy. Parents from Germany (the German Socio-Economic Panel Study, N = 10,649) and the United Kingdom (British Household Panel Study and Understanding Society, N = 11,012) reported their new-born's birthweight and gestational age, subsequently categorised as very preterm or very low birthweight (VP/VLBW, < 32 weeks or < 1500 g), moderately/late preterm or low birthweight (MLP/LBW, ≥ 32 weeks and < 37 weeks/≥ 1500 g and < 2500 g), or term-born (≥ 37 weeks and ≥ 2500 g). Mixed models were used to analyse life satisfaction, an aspect of wellbeing, at four assessments-two years and six months before birth and six months and two years afterwards. Two years before birth, satisfaction of prospective term-born, MLP/LBW, or VP/VLBW mothers did not significantly differ. However, mothers of VP/VLBWs had lower satisfaction relative to mothers of term-borns at both assessments post-birth. Among fathers, satisfaction levels were similarly equivalent two years before birth. Subsequently, fathers of VP/VLBWs temporarily differed in satisfaction six months post-birth relative to fathers of term-borns. Results indicate that parents' lower life satisfaction after VP/VLBW birth is not a continuation of pre-existing life satisfaction differences.
| S-EPMC10692203 | biostudies-literature
Project description:ImportancePreterm birth has been associated with increased risk of heart failure (HF) early in life, but its association with new-onset HF in adulthood appears to be unknown.ObjectiveTo determine whether preterm birth is associated with increased risk of HF from childhood into mid-adulthood in a large population-based cohort.Design, setting, and participantsThis national cohort study was conducted in Sweden with data from 1973 through 2015. All singleton live births in Sweden during 1973 through 2014 were included.ExposuresGestational age at birth, identified from nationwide birth records.Main outcomes and measuresHeart failure, as identified from inpatient and outpatient diagnoses through 2015. Cox regression was used to determine hazard ratios (HRs) for HF associated with gestational age at birth while adjusting for other perinatal and maternal factors. Cosibling analyses assessed for potential confounding by unmeasured shared familial (genetic and/or environmental) factors.ResultsA total of 4 193 069 individuals were included (maximum age, 43 years; median age, 22.5 years). In 85.0 million person-years of follow-up, 4158 persons (0.1%) were identified as having HF (median [interquartile range] age, 15.4 [28.0] years at diagnosis). Preterm birth (gestational age <37 weeks) was associated with increased risk of HF at ages younger than 1 year (adjusted HR [aHR], 4.49 [95% CI, 3.86-5.22]), 1 to 17 years (aHR, 3.42 [95% CI, 2.75-4.27]), and 18 to 43 years (aHR, 1.42 [95% CI, 1.19-1.71]) compared with full-term birth (gestational age, 39-41 weeks). At ages 18 through 43 years, the HRs further stratified by gestational age were 4.72 (95% CI, 2.11-10.52) for extremely preterm births (22-27 weeks), 1.93 (95% CI, 1.37-2.71) for moderately preterm births (28-33 weeks), 1.24 (95% CI, 1.00-1.54) for late preterm births (34-36 weeks), and 1.09 (95% CI, 0.97-1.24) for early term births (37-38 weeks). The corresponding HF incidence rates (per 100 000 person-years) at ages 18 through 43 years were 31.7, 13.8, 8.7, and 7.3, respectively, compared with 6.6 for full-term births. These associations persisted when excluding persons with structural congenital cardiac anomalies. The associations at ages 18 through 43 years (but not <18 years) appeared to be largely explained by shared determinants of preterm birth and HF within families. Preterm birth accounted for a similar number of HF cases among male and female individuals.Conclusions and relevanceIn this large national cohort, preterm birth was associated with increased risk of new-onset HF into adulthood. Survivors of preterm birth may need long-term clinical follow-up into adulthood for risk reduction and monitoring for HF.
| S-EPMC8022265 | biostudies-literature
Project description:ObjectiveTo determine whether women with spontaneous preterm birth (PTB) have increased risks for long-term mortality.DesignRetrospective cohort.SettingBirths in Utah between 1939 and 1977.PopulationWe included women with a singleton live birth ≥20 weeks who survived at least 1 year following delivery. We excluded those who had never lived in Utah, had improbable birthweight/gestational age combinations, underwent induction (except for preterm membrane rupture) or had another diagnosis likely to cause PTB.MethodsExposed women had ≥1 spontaneous PTB between 20+0 weeks and 37+0 weeks. Women with >1 spontaneous PTB were included only once. Unexposed women had all deliveries at or beyond 38+0 weeks. Exposed women were matched to unexposed women by birth year, infant sex, maternal age group and infant birth order. Included women were followed up to 39 years after index delivery.Main outcome measuresOverall and cause-specific mortality risks were compared using Cox regression.ResultsWe included 29 048 exposed and 57 992 matched unexposed women. There were 3551 deaths among exposed (12.2%) and 6013 deaths among unexposed women (10.4%). Spontaneous PTB was associated with all-cause mortality (adjusted hazard ratio [aHR] 1.26, 95% confidence interval [CI] 1.21-1.31), death from neoplasms (aHR 1.10, 95% CI 1.02-1.18), circulatory disease (aHR 1.35, 95% CI 1.25-1.46), respiratory disease (aHR 1.73, 95% CI 1.46-2.06), digestive disease (aHR 1.33, 95% CI 1.12-1.58), genito-urinary disease (aHR 1.60, 95% CI 1.15-2.23) and external causes (aHR 1.39, 95% CI 1.22-1.58).ConclusionsSpontaneous PTB is associated with modestly increased risks for all-cause and some cause-specific mortality.
| S-EPMC10592573 | biostudies-literature
Project description:A very large fetal pericardial teratoma was diagnosed at 28 weeks' gestation, prompting urgent multidisciplinary expert consultations to weigh the risks and benefits of various prenatal invasive procedures and preterm delivery for postnatal surgical management. Ultimately, the infant was born by planned cesarean section and underwent immediate cardiopulmonary bypass and surgical resection.
| S-EPMC10865117 | biostudies-literature