TY - JOUR
T1 - Risks of nonchromosomal birth defects, small-for-gestational age birthweight, and prematurity with in vitro fertilization
T2 - effect of number of embryos transferred and plurality at conception versus at birth
AU - Luke, Barbara
AU - Brown, Morton B.
AU - Wantman, Ethan
AU - Forestieri, Nina E.
AU - Browne, Marilyn L.
AU - Fisher, Sarah C.
AU - Yazdy, Mahsa M.
AU - Ethen, Mary K.
AU - Canfield, Mark A.
AU - Nichols, Hazel B.
AU - Oehninger, Sergio
AU - Doody, Kevin J.
AU - Sutcliffe, Alastair G.
AU - Williams, Carrie
AU - Eisenberg, Michael L.
AU - Baker, Valerie L.
AU - Sacha, Caitlin R.
AU - Lupo, Philip J.
N1 - Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.
PY - 2021/4
Y1 - 2021/4
N2 - Purpose: Excess embryos transferred (ET) (> plurality at birth) and fetal heartbeats (FHB) at 6 weeks’ gestation are associated with reductions in birthweight and gestation, but prior studies have been limited by small sample sizes and limited IVF data. This analysis evaluated associations between excess ET, excess FHB, and adverse perinatal outcomes, including the risk of nonchromosomal birth defects. Methods: Live births conceived via IVF from Massachusetts, New York, North Carolina, and Texas included 138,435 children born 2004–2013 (Texas), 2004–2016 (Massachusetts and North Carolina), and 2004–2017 (New York) were classified by ET and FHB. Major birth defects were reported by statewide registries within the first year of life. Logistic regression was used to estimate adjusted odds ratios (AORs) and 95% CIs of the risks of a major nonchromosomal birth defect, small-for-gestational age birthweight (SGA), low birthweight (LBW), and preterm birth (≤36 weeks), by excess ET, and excess ET + excess FHB, by plurality at birth (singletons and twins). Results: In singletons with [2 ET, FHB =1] and [≥3 ET, FHB=1], risks [AOR (95% CI)] were increased, respectively, for major nonchromosomal birth defects [1.13 (1.00–1.27) and 1.18 (1.00–1.38)], SGA [1.10 (1.03–1.17) and 1.15 (1.05–1.26)], LBW [1.09 (1.02–1.13) and 1.17 (1.07–1.27)], and preterm birth [1.06 (1.00–1.12) and 1.14 (1.06–1.23)]. With excess ET + excess FHB, risks of all adverse outcomes except major nonchromosomal birth defects increased further for both singletons and twins. Conclusion: Excess embryos transferred are associated with increased risks for nonchromosomal birth defects, reduced birthweight, and prematurity in IVF-conceived births.
AB - Purpose: Excess embryos transferred (ET) (> plurality at birth) and fetal heartbeats (FHB) at 6 weeks’ gestation are associated with reductions in birthweight and gestation, but prior studies have been limited by small sample sizes and limited IVF data. This analysis evaluated associations between excess ET, excess FHB, and adverse perinatal outcomes, including the risk of nonchromosomal birth defects. Methods: Live births conceived via IVF from Massachusetts, New York, North Carolina, and Texas included 138,435 children born 2004–2013 (Texas), 2004–2016 (Massachusetts and North Carolina), and 2004–2017 (New York) were classified by ET and FHB. Major birth defects were reported by statewide registries within the first year of life. Logistic regression was used to estimate adjusted odds ratios (AORs) and 95% CIs of the risks of a major nonchromosomal birth defect, small-for-gestational age birthweight (SGA), low birthweight (LBW), and preterm birth (≤36 weeks), by excess ET, and excess ET + excess FHB, by plurality at birth (singletons and twins). Results: In singletons with [2 ET, FHB =1] and [≥3 ET, FHB=1], risks [AOR (95% CI)] were increased, respectively, for major nonchromosomal birth defects [1.13 (1.00–1.27) and 1.18 (1.00–1.38)], SGA [1.10 (1.03–1.17) and 1.15 (1.05–1.26)], LBW [1.09 (1.02–1.13) and 1.17 (1.07–1.27)], and preterm birth [1.06 (1.00–1.12) and 1.14 (1.06–1.23)]. With excess ET + excess FHB, risks of all adverse outcomes except major nonchromosomal birth defects increased further for both singletons and twins. Conclusion: Excess embryos transferred are associated with increased risks for nonchromosomal birth defects, reduced birthweight, and prematurity in IVF-conceived births.
KW - Assisted reproductive technology (ART)
KW - Birth defects
KW - Embryos transferred
KW - Fetal heartbeats
KW - In vitro fertilization (IVF)
KW - Vanishing twin syndrome
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U2 - 10.1007/s10815-021-02095-3
DO - 10.1007/s10815-021-02095-3
M3 - Article
C2 - 33547526
AN - SCOPUS:85100544411
SN - 1058-0468
VL - 38
SP - 835
EP - 846
JO - Journal of Assisted Reproduction and Genetics
JF - Journal of Assisted Reproduction and Genetics
IS - 4
ER -