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Cited by 17Maternal and fetal healthcarePregnancy and preeclampsia studiesMaternal and Perinatal Health Interventions

Change in paternity, risk of placental abruption and confounding by birth interval: a population-based prospective cohort study in Norway, 1967-2009

Open access
Ananth, Cande V, Skjaerven, Rolv, Klunssoyr, Kari·2015·BMJ Open
DOI 10.1136/bmjopen-2014-007023PMC PMC4325127
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Abstract

OBJECTIVES: We examined abruption risk in relation to change in paternity, and evaluated if birth interval confounds this association. SETTING: Population-based study of singleton births in Norway between 1967 and 2009. PARTICIPANTS: Women who had their first two (n=747 566) singleton births in the Norwegian Medical Birth Registry. The associations between partner change between pregnancies and birth interval were examined in relation to abruption in a series of logistic regression models. PRIMARY OUTCOME MEASURES: Risk, as well as unadjusted and adjusted OR of placental abruption in relation to change in paternity and interval between births. RESULTS: Among women without abruption in their first pregnancy, the risks of abruption in the second pregnancy were 4.7 and 6.5 per 1000 in women who had the same and different partners, respectively (OR=1.39, 95% CI 1.26 to 1.53). After adjustments for confounders including birth interval and smoking, partner change was not associated with abruption (OR=1.01, 95% CI 0.79 to 1.32). Among women with abruption in the first pregnancy, the association between partner change and abruption in the second pregnancy was 0.98 (95% CI 0.75 to 1.28). Interval <1 year was associated with increased abruption risk in the second pregnancy among women with the same as well as different partners, but interval over 4 years was only associated with increased risk among women with the same partner. No such patterns were seen for recurrent abruption. CONCLUSIONS: We find no evidence that a change in partner is associated with increased abruption risk. Theories supporting an immune maladaptation hypothesis afforded by change in paternity are not supported insofar as abruption is concerned.

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  • Pregnant people with an abruption in one pregnancy carry up to a 10-fold increased risk of recurrence in a subsequent pregnancy.

    “Pregnant people with an abruption in one pregnancy carry up to a 10-fold increased risk of recurrence in a subsequent pregnancy; the recurrence risk is 25-fold higher in a third pregnancy when two prior pregnancies are complicated by abruption (23–26).”

    From Placental abruption at near-term and term gestations: Pathophysiology, epidemiology, diagnosis, and management (2023) · cites this paper as [25]

  • The recurrence risk is 25-fold higher in a third pregnancy when two prior pregnancies are complicated by abruption.

    “Pregnant people with an abruption in one pregnancy carry up to a 10-fold increased risk of recurrence in a subsequent pregnancy; the recurrence risk is 25-fold higher in a third pregnancy when two prior pregnancies are complicated by abruption (23–26).”

    From Placental abruption at near-term and term gestations: Pathophysiology, epidemiology, diagnosis, and management (2023) · cites this paper as [25]

    The Abstract Results and Results sections discuss abruption in a second pregnancy after a first, but do not report risk in a third pregnancy after two prior abruptions. Searches for the third-pregnancy scenario and a 25-fold recurrence risk found no passage supporting that figure. (LLM, conf=0.76)

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Authors
Ananth, C. V., Skjaerven, R., & Klunssoyr, K.
Affiliations
  • Columbia University (US)
  • Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
  • Norwegian Institute of Public Health (NO)
ORCID
Ananth, Cande V
Venue
BMJ Open
Publisher
BMJ
Published
2015-02
Volume
5
Issue
2
Pages
e007023
ISSN
2044-6055 (ISSN-L)
DOI
10.1136/bmjopen-2014-007023
PMC
PMC4325127
OpenAlex
W2152661052
Cited by
17
References
39
Citations by year
2026: 1 · 2025: 2 · 2023: 1 · 2021: 4 · 2020: 2 · 2019: 1 · 2018: 3 · 2017: 2 · 2016: 1
FWCI
1.99
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • BMJ Open (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • NORA - Norwegian Open Research Archives (submittedVersion, cc-by-nc)
  • BIBSYS Brage (BIBSYS (Norway)) (submittedVersion)
  • NORA - Norwegian Open Research Archives (submittedVersion, other-oa)
Topics
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Maternal and fetal healthcare
  • Health Sciences › Medicine › Obstetrics and Gynecology › Pregnancy and preeclampsia studies
  • Health Sciences › Medicine › Obstetrics and Gynecology › Maternal and Perinatal Health Interventions
Keywords
placental abruption, birth interval, partner change, pregnancy outcomes, confounding, smoking
MeSH terms
Abruptio Placentae, Adolescent, Adult, Birth Intervals, Female, Humans, Male, Norway, Parity, Paternity, Pregnancy, Prospective Studies, Retrospective Studies, Risk Factors, Logistic Models, Odds Ratio, Reproductive Behavior, Young Adult

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