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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Obstetrics and Gynecology</journal-id><journal-title-group><journal-title xml:lang="en">Obstetrics and Gynecology</journal-title><trans-title-group xml:lang="ru"><trans-title>Акушерство и гинекология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0300-9092</issn><issn publication-format="electronic">2412-5679</issn><publisher><publisher-name xml:lang="en">Bionika Media</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">716478</article-id><article-id pub-id-type="doi">10.18565/aig.2026.21</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Оригинальные статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Risk prediction of spontaneous preterm birth in twin pregnancy: a nomogram</article-title><trans-title-group xml:lang="ru"><trans-title>Прогнозирование рисков развития спонтанных преждевременных родов при многоплодной беременности: номограмма</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8131-4682</contrib-id><name-alternatives><name xml:lang="en"><surname>Gladkova</surname><given-names>Kristina A.</given-names></name><name xml:lang="ru"><surname>Гладкова</surname><given-names>Кристина Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Senior Researcher at the Department of Fetal Medicine, Institute of Obstetrics, Head of the 1st Obstetric Department of Pregnancy Pathology</p></bio><bio xml:lang="ru"><p>к.м.н., с.н.с. отдела медицины плода института акушерства, заведующая 1-м акушерским отделением патологии беременности</p></bio><email>k_gladkova@oparina4.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kiryanova</surname><given-names>Anastasia O.</given-names></name><name xml:lang="ru"><surname>Кирьянова</surname><given-names>Анастасия Олеговна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>6th year student at N.V. Sklifosovsky Institute of Clinical Medicine</p></bio><bio xml:lang="ru"><p>студентка 6 курса Института клинической медицины им. Н.В. Склифосовского</p></bio><email>anastasia.kiryanova2002@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5870-4655</contrib-id><name-alternatives><name xml:lang="en"><surname>Sakalo</surname><given-names>Victoria A.</given-names></name><name xml:lang="ru"><surname>Сакало</surname><given-names>Виктория Анатольевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Researcher at the Department of Obstetrics and Extragenital Pathology, Institute of Obstetrics, obstetrician-gynecologist at the 1st Obstetric Department of Pregnancy Pathology</p></bio><bio xml:lang="ru"><p>к.м.н., н.с. отдела акушерской и экстрагенитальной патологии института акушерства, врач акушер-гинеколог 1-го акушерского отделения патологии беременности</p></bio><email>v_sakalo@oparina4.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Vtorushina</surname><given-names>Valentina V.</given-names></name><name xml:lang="ru"><surname>Вторушина</surname><given-names>Валентина Валентиновна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Doctor of Clinical Laboratory Diagnostics at the Laboratory of Clinical Immunology</p></bio><bio xml:lang="ru"><p>к.м.н., врач клинической лабораторной диагностики лаборатории клинической иммунологии</p></bio><email>v_vtorushina@oparina4.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Academician V.I. Kulakov National Medical Research Center for Obstetrics, Gynecology and Perinatology, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр акушерства, гинекологии и перинатологии имени академика В.И. Кулакова» Министерства здравоохранения Российской Федерации</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia (Sechenov University)</institution></aff><aff><institution xml:lang="ru">ФГАОУ ВО «Первый Московский государственный медицинский университет имени И.М. Сеченова» Минздрава России (Сеченовский Университет)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-07-17" publication-format="electronic"><day>17</day><month>07</month><year>2026</year></pub-date><issue>6</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>82</fpage><lpage>91</lpage><history><date date-type="received" iso-8601-date="2026-07-16"><day>16</day><month>07</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-07-16"><day>16</day><month>07</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Bionika Media</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, ООО «Бионика Медиа»</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Bionika Media</copyright-holder><copyright-holder xml:lang="ru">ООО «Бионика Медиа»</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0300-9092/article/view/716478">https://journals.eco-vector.com/0300-9092/article/view/716478</self-uri><abstract xml:lang="en"><p>Preterm birth remains a leading cause of perinatal morbidity and mortality in twin pregnancy.</p> <p><bold>Objective.</bold> To improve perinatal outcomes in twin pregnancies by creating a nomogram to predict the risks of spontaneous preterm births.</p> <p><bold>Materials and methods.</bold> The study included 839 patients with twin pregnancies. Based on pregnancy outcomes, the patients were divided into two groups. Group 1 consisted of women (n=175) whose pregnancies ended in term births. Group 2 included women (n=664) whose pregnancies ended in preterm births. A nomogram for the risk of preterm birth was constructed based on significant predictors, and its predictive performance was evaluated using ROC analysis.</p> <p><bold>Results.</bold> Multivariate analysis identified that independent predictors of preterm birth were twin growth discordance (OR=1.044; 95% CI 1.024–1.064; p&lt; 0.001) and twin chorionicity (monochorionic diamniotic twins: OR=2.993; 95% CI 1.677–5.340; p&lt; 0.001). The nomogram model included these predictors, and was developed to estimate the individual preterm birth risk. ROC curve analysis confirmed satisfactory predictive performance of the model (AUC=0.766).</p> <p><bold>Conclusion.</bold> The risk of spontaneous preterm birth in twin pregnancy is primarily associated with twin chorionicity and twin growth discordance, that is important for personalized high-risk patient management.</p></abstract><trans-abstract xml:lang="ru"><p>Преждевременные роды остаются ведущей причиной перинатальной заболеваемости и смертности при многоплодной беременности.</p> <p><bold>Цель.</bold> Улучшить перинатальные исходы многоплодной беременности созданием номограммы для прогнозирования рисков спонтанных преждевременных родов</p> <p><bold>Материалы и методы.</bold> В исследование включено 839 пациенток с двойней. В зависимости от исхода (преждевременные роды или своевременные роды) пациентки были распределены на группы: группа 1 – пациентки со своевременными родами (n=175), группа 2 – пациентки с преждевременными родами (n=664). На основе значимых предикторов с помощью ROC-анализа построена номограмма для оценки риска преждевременных родов.</p> <p><bold>Результаты. </bold>При многофакторном анализе независимыми предикторами преждевременных родов явились дискордантность массы тела плодов (ОШ=1,044; 95% ДИ 1,024–1,064; p&lt; 0,001) и хориальность двойни (монохориальная диамниотическая: ОШ=2,993; 95% ДИ 1,677–5,340; p&lt; 0,001). На основе модели построена номограмма для расчета риска преждевременных родов. Удовлетворительная прогностическая ценность модели была подтверждена ROC-анализом (AUC=0,766).</p> <p><bold>Заключение.</bold> Риск преждевременных родов при многоплодной беременности наиболее ассоциирован с хориальностью двойни и дискордантностью роста плодов, что важно для персонализированного ведения пациенток высокого риска.</p></trans-abstract><kwd-group xml:lang="en"><kwd>preterm birth</kwd><kwd>multiple pregnancy</kwd><kwd>risk factors</kwd><kwd>nomogram</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>преждевременные роды</kwd><kwd>многоплодная беременность</kwd><kwd>факторы риска</kwd><kwd>номограмма</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>World Health Organization. Preterm birth. Available at: https://www.who.int/news-room/fact-sheets/detail/preterm-birth.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Menzies R., Li A.L.K., Melamed N., Shah P.S., Horn D., Barrett J. et al. Risk of singleton preterm birth after prior twin preterm birth: a systematic review and meta-analysis. Am. J. Obstet. Gynecol. 2020; 223(2): 204.e1-e8. https:// dx.doi.org/10.1016/j.ajog.2020.02.003</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Zierden H.C., Shapiro R.L., DeLong K., Carter D.M., Ensign L.M. Next generation strategies for preventing preterm birth. Adv. Drug. Deliv. Rev. 2021; 174: 190-209. https://dx.doi.org/10.1016/j.addr.2021.04.021</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Emms A., Pilarski N., Hodgetts Morton V. Preterm labour and birth: prevention strategies and preparation for delivery. Obstet. Gynaecol. Reprod. Med. 2025; 35: 193-8. https://dx.doi.org/10.1016/j.ogrm.2025.04.003</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Deng C., Dai L., Yi L., Li X., Deng K., Mu Y. et al. Temporal trends in the birth rates and perinatal mortality of twins: a population-based study in China. PLoS One. 2019; 14(1): e0209962. https://dx.doi.org/10.1371/journal.pone.0209962</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Li S., Gao J., Liu J., Hu J., Chen X., He J. et al. Perinatal outcomes and risk factors for preterm birth in twin pregnancies in a Chinese population: a multi-center retrospective study. Front. Med. (Lausanne). 2021; 8: 657862. https://dx.doi.org/10.3389/fmed.2021.657862</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Amelio G.S., Provitera L., Raffaeli G., Tripodi M., Amodeo I., Gulden S. et al. Endothelial dysfunction in preterm infants: the hidden legacy of uteroplacental pathologies. Front. Pediatr. 2022; 10: 1041919. https://dx.doi.org/10.3389/fped.2022.1041919</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Гладкова К.А., Ходжаева З.С., Сакало В.А., Фролова Е.Р., Шакая М.Н., Киртбая А.Р. Роль факторов васкуло- и ангиогенеза в перинатальных исходах, неонатальной заболеваемости и смертности при осложненной монохориальной многоплодной беременности. Акушерство и гинекология. 2023; 12: 95-103. https://dx.doi.org/10.18565/aig.2023.243 [Gladkova K.A., Khodzhaeva Z.S., Sakalo V.A., Frolova E.R., Shakaya M.N., Kirtbaya A.R. The role of vasculogenic and angiogenic factors in perinatal outcomes, neonatal morbidity, and mortality in complicated monochorionic multiple pregnancies. Obstetrics and Gynecology. 2023; (12): 95-103 (in Russian). https:// dx.doi.org/10.18565/aig.2023.243].</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Oger A.S., Robillard P.Y., Barau G., Randrianaivo H., Bonsante F., Iacobelli S. et al. Perinatal outcome of monochorionic and dichorionic twin gestations: a study of 775 pregnancies at Reunion Island. J. Gynecol. Obstet. Biol. Reprod. (Paris). 2013; 42(7): 655-61. French. https://dx.doi.org/10.1016/j.jgyn.2013.02.010</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Нефтерева А.А., Сакало В.А, Гладкова К.А., Костюков К.В., Ходжаева З.С. Возможные молекулярно-биологические механизмы формирования синдрома селективной задержки роста плода при монохориальной беременности. Акушерство и гинекология. 2021; 10: 5-12. https:// dx.doi.org/10.18565/aig.2021.10.5-12 [Neftereva A.A., Sakalo V.A., Gladkova K.A., Kоstyukov K.V., Khodzhaeva Z.S. Possible molecular and biological mechanisms for the development of selective fetal growth restriction in monochorionic twin pregnancy. Obstetrics and Gynecology. 2021; (10): 5-12 (in Russian). https://dx.doi.org/10.18565/aig.2021.10.5-12].</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Гладкова К.А., Сакало В.А., Фролова Е.Р., Костюков К.В., Ходжаева З.С. Осложнения фетоскопической лазерной коагуляции сосудистых анастомозов плаценты при фето-фетальном трансфузионном синдроме. Проблемы репродукции. 2024; 30(5): 55-63. https://dx.doi.org/10.17116/repro20243005155 [Gladkova K.A., Sakalo V.A., Frolova E.R., Kostyukov K.V., Khodzhaeva Z.S. Complications of fetoscopic laser coagulation of placental anastomosis in twin-to-twin transfusion syndrome. Russian Journal of Human Reproduction. 2024; 30(5): 55-63. (in Russian). https://doi.org/10.17116/repro20243005155].</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Seetho S., Kongwattanakul K., Saksiriwuttho P., Thepsuthammarat K. Epidemiology and factors associated with preterm births in multiple pregnancy: a retrospective cohort study. BMC Pregnancy Childbirth. 2023; 23(1): 872. https://dx.doi.org/10.1186/s12884-023-06186-0</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Yang X., Zhong Q., Li L., Chen Y., Tang C., Liu T. et al. Development and validation of a prediction model on spontaneous preterm birth in twin pregnancy: a retrospective cohort study. Reprod. Health. 2023; 20(1): 187. https://dx.doi.org/10.1186/s12978-023-01728-3</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Vandenbroucke J.P., von Elm E., Altman D.G., Gotzsche P.C., Mulrow C.D., Pocock S.J. et al. Повышение качества отчетов о наблюдательных исследованиях в эпидемиологии (STROBE): разъяснения и уточнения. Вопросы современной педиатрии. 2022; 21(3): 173-208. https://dx.doi.org/10.15690/vsp.v21i3.2426 [Vandenbroucke J.P., von Elm E., Altman D.G., Gotzsche P.C., Mulrow C.D., Pocock S.J. et al. Strengthening the Reporting of Observational Studies in Epidemiology (STROBE): Explanation and Elaboration. Current Pediatrics. 2022; 21(3): 173-208. (in Russian). https://doi.org/10.15690/ vsp.v21i3.2426].</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Министерство здравоохранения Российской Федерации. Клинические рекомендации. Преждевременные роды. М.; 2024. 28 с. [Ministry of Health of the Russian Federation. Clinical guidelines. Premature birth. Moscow; 2024. 28 p. (in Russian)].</mixed-citation></ref></ref-list></back></article>
