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- W2896912305 abstract "Objective To assess the risk of stillbirth in low‐risk in vitro fertilisation ( IVF ) pregnancies. Design Register‐based national cohort study. Setting Denmark 2003–2013. Population Cohort of 425 732 singleton pregnancies including 10 235 conceived following IVF /intracytoplasmic sperm injection ( ICSI ), 4521 conceived following intrauterine insemination ( IUI ), and 410 976 spontaneously conceived. Methods Information on pregnancy, obstetrical risk factors, stillbirth, and fertility treatment was obtained from the Danish national health registers for all pregnancies after gestational week 21 +6 . We estimated the overall and gestational age‐specific risk of stillbirth in low‐risk term pregnancies following IVF , ICSI , and IUI . Further, we estimated the association between stillbirth and IVF and ICSI respectively as well as fresh or frozen‐thawed embryo transfer. Main outcome measures Risk of stillbirth. Results The number of stillbirths in spontaneously conceived and IVF / ICSI low‐risk term pregnancies was 525 (0.1%) and 35 (0.3%), respectively. In multivariate analysis, the risk of stillbirth in pregnancies following IVF / ICSI was increased (odds ratio 2.1, 95% CI 1.4–3.1). The risk of stillbirth was correspondingly increased in time‐to‐event analyses taking risk time for each fetus into account from gestational week 37 and onwards (hazard ratio 2.4, 95% CI 1.6–3.6). In sub‐analyses, the risk of stillbirth was increased for pregnancies following ICSI (odds ratio 2.2, 95% CI 1.2–3.1), but not IVF ( odds ratio 1.7, 95% CI 0.9–3.1). Conclusion We found a systematically increased risk of stillbirth in low‐risk term pregnancies following IVF / ICSI . Whether the risk was related to the treatment or to underlying subfertility is uncertain. The results may indicate a need for obstetrical surveillance for these pregnancies when reaching term. Tweetable abstract Increased risk of stillbirth in low‐risk term pregnancies following fresh cycle IVF/ICSI." @default.
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- W2896912305 date "2018-11-16" @default.
- W2896912305 modified "2023-10-18" @default.
- W2896912305 title "Risk of stillbirth in low‐risk singleton term pregnancies following fertility treatment: a national cohort study" @default.
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- W2896912305 doi "https://doi.org/10.1111/1471-0528.15509" @default.
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