Effect of parity on gestational age at delivery in multiple gestation pregnancies

Journal of Perinatology : Official Journal of the California Perinatal Association
S JamesJ Stewart

Abstract

To estimate the effect of parity on gestational age (GA) at birth in multifetal pregnancies. Birth data from the public-access Matched Multiple Birth File produced by the National Center for Health Statistics from 1995 to 2000 were analyzed following IRB approval. GA, parity and demographic data were analyzed with parametric and nonparametric tests, including regression analysis, using SPSS. Data from women with twin (n=316,983), triplet (n=11,981), and quadruplet (n=766) pregnancies were analyzed. A significantly higher proportion of nulliparous versus parous women were Caucasian (twins: 82 versus 77%; triplets: 91 versus 87%) and had more than 15 years of education (twins: 39 versus 24%; triplets: 55 versus 39%; quadruplets: 53 versus 35%). Mean GA was 5.6 days longer for twins, 5.4 days longer for triplets and 6.8 days longer for quadruplets born to parous versus nulliparous women. Caucasian and African-American parous women pregnant with twins or triplets delivered their babies at a later GA than their nulliparous counterparts at each level of education. GA at delivery increased as a function of age of the mother in nulliparous and parous women of twins or triplets, and at every age level, parous women delivered their babie...Continue Reading

References

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Citations

Jan 1, 2011·Case Reports in Obstetrics and Gynecology·Fawaz E Edris
Jan 26, 2010·Nature Reviews. Endocrinology·Allan Flyvbjerg
Dec 1, 2020·The Journal of Maternal-fetal & Neonatal Medicine : the Official Journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians·Yan ChenJun Zhang

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