{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,12]],"date-time":"2025-09-12T19:34:29Z","timestamp":1757705669345},"reference-count":32,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2010,12,31]],"date-time":"2010-12-31T00:00:00Z","timestamp":1293753600000},"content-version":"vor","delay-in-days":1217,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2007,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p><jats:italic>Background.<\/jats:italic> The rate of twin gestations is now about 3% of all pregnancies. The study objective was to investigate the association between twin pregnancy newborn outcomes and maternal weight. <jats:italic>Methods.<\/jats:italic> Birth certificate information of 1,342 sets of live\u2010born twin deliveries collected in a regional perinatal data system from a contiguous eight\u2010county area in upstate New York was studied. <jats:italic>Results.<\/jats:italic> The obese maternal pre\u2010pregnancy BMI category was correlated with an increased odds ratio of a \u201cType I\u201d (both a \u226536\u2010week gestation and a \u22652,500\u2010g average twin weight) newborn outcome (adjusted OR 1.92; 95% CI: 1.43, 2.56). For total maternal weight gain, there was an increased odds ratio of having a Type I newborn outcome with &gt;25 kg weight gain (adjusted OR 2.24; 95% CI: 1.51, 3.33). <jats:italic>Conclusions.<\/jats:italic> Based on this population\u2010based study, we conclude that both maternal pre\u2010pregnancy BMI and total maternal weight gain are associated with twin newborn outcomes.<\/jats:p>","DOI":"10.1080\/00016340701417026","type":"journal-article","created":{"date-parts":[[2007,8,22]],"date-time":"2007-08-22T12:16:28Z","timestamp":1187784988000},"page":"1051-1057","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Association of pre\u2010pregnancy maternal body mass and maternal weight gain to newborn outcomes in twin pregnancies"],"prefix":"10.1111","volume":"86","author":[{"given":"JOHN","family":"YEH","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"JAMES 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