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Reprod. Health"],"abstract":"<jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To examine the influence of Gestational Weight Gain on adverse pregnancy outcomes in twin pregnant women with different pre-pregnancy Body Mass Index Categories and provide more basis for prenatal guidance and monitoring of twins.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Twin pregnant women with gestation age\u2009\u2265\u200928 weeks who had gave birth from 2022 to 2023 were considered as research subjects. Information on mothers and newborns was collected. Logistic regression model was used to estimate the independent impact of Gestational Weight Gain rate on the outcomes and the impact of Gestational Weight Gain rate on the outcome under different pre-pregnancy Body Mass Index Categories.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Overall, 919 twin pregnant women and 1838 newborns were included. The logistic regression model shown that inadequate Gestational Weight Gain in all groups significantly elevated the risk of preterm birth. Inadequate Gestational Weight Gain increased the likelihood of Small for Gestational Age infant (\n                      <jats:sub>a<\/jats:sub>\n                      OR\u2009=\u20092.10, 95%CI: 1.43\u20133.09). Besides, excessive Gestational Weight Gain raised the probability of Hypertensive Disorders of Pregnancy (\n                      <jats:sub>a<\/jats:sub>\n                      OR\u2009=\u20092.60, 95%CI:1.78\u20133.78) and Large for gestational age infant (\n                      <jats:sub>a<\/jats:sub>\n                      OR\u2009=\u20091.77, 95%CI: 1.24\u20132.51).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>In twin pregnancies, inappropriate weight gain might be correlated with preterm birth, Small for Gestational Age infant, hypertensive disorders of pregnancy and Large for Gestational Age infant. We propose that personalized counseling and guidance on weight gain and nutrition should be provided to women with twin pregnancies.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/frph.2026.1752008","type":"journal-article","created":{"date-parts":[[2026,5,14]],"date-time":"2026-05-14T05:35:01Z","timestamp":1778736901000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Association of gestational weight gain with adverse pregnancy outcomes across body mass index categories for twins in China"],"prefix":"10.3389","volume":"8","author":[{"given":"Huiyuan","family":"Zhu","sequence":"first","affiliation":[{"name":"Hunan Key Laboratory of Typical Environmental Pollution and Health Hazards of Hunan Province, School of Public Health, Hengyang Medical School, University of South China","place":["Hengyang, Hunan, 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