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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">Oncohematology</journal-id><journal-title-group><journal-title xml:lang="en">Oncohematology</journal-title><trans-title-group xml:lang="ru"><trans-title>Онкогематология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1818-8346</issn><issn publication-format="electronic">2413-4023</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">1121</article-id><article-id pub-id-type="doi">10.17650/1818-8346-2026-21-3-93-101</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>RARE AND COMPLEX CLINICAL SITUATIONS: DIAGNOSTIC DIFFICULTIE AND TREATMENT CHOICE</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>РЕДКИЕ И СЛОЖНЫЕ КЛИНИЧЕСКИЕ СИТУАЦИИ: ТРУДНОСТИ ДИАГНОСТИКИ И ВЫБОР ТАКТИКИ ЛЕЧЕНИЯ</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">Pregnancy in patients with Ph-negative myeloproliferative neoplasms: therapy and prevention of complications</article-title><trans-title-group xml:lang="ru"><trans-title>Беременность у пациенток с Ph-негативными миелопролиферативными новообразованиями: терапия и профилактика осложнений</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-8021-9203</contrib-id><name-alternatives><name xml:lang="en"><surname>Poghosyan</surname><given-names>K. Т.</given-names></name><name xml:lang="ru"><surname>Погосян</surname><given-names>К. Т.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>poghosyan.kristina@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2119-3775</contrib-id><name-alternatives><name xml:lang="en"><surname>Melikyan</surname><given-names>A. L.</given-names></name><name xml:lang="ru"><surname>Меликян</surname><given-names>А. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>poghosyan.kristina@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Starchenko</surname><given-names>S. E.</given-names></name><name xml:lang="ru"><surname>Старченко</surname><given-names>С. Э.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>poghosyan.kristina@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3883-185X</contrib-id><name-alternatives><name xml:lang="en"><surname>Gilyazitdinova</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Гилязитдинова</surname><given-names>Е. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>poghosyan.kristina@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9045-8653</contrib-id><name-alternatives><name xml:lang="en"><surname>Subortseva</surname><given-names>I. N.</given-names></name><name xml:lang="ru"><surname>Суборцева</surname><given-names>И. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>poghosyan.kristina@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1945-0154</contrib-id><name-alternatives><name xml:lang="en"><surname>Polushkina</surname><given-names>E. S.</given-names></name><name xml:lang="ru"><surname>Полушкина</surname><given-names>Е. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>poghosyan.kristina@yahoo.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-8510-6954</contrib-id><name-alternatives><name xml:lang="en"><surname>Tolmacheva</surname><given-names>A. O.</given-names></name><name xml:lang="ru"><surname>Толмачева</surname><given-names>А. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>poghosyan.kristina@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1099-8092</contrib-id><name-alternatives><name xml:lang="en"><surname>Pustovaya</surname><given-names>E. I.</given-names></name><name xml:lang="ru"><surname>Пустовая</surname><given-names>Е. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>poghosyan.kristina@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6288-7570</contrib-id><name-alternatives><name xml:lang="en"><surname>Kulikov</surname><given-names>S. M.</given-names></name><name xml:lang="ru"><surname>Куликов</surname><given-names>С. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>poghosyan.kristina@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">National Medical Research Center for Hematology, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр гематологии» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">National Medical Research Center for Obstetrics, Gynecology and Perinatology named after Acad. V.I. Kulakov, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр акушерства, гинекологии и перинатологии им. акад. В. И. Кулакова» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-09-30" publication-format="electronic"><day>30</day><month>09</month><year>2026</year></pub-date><volume>21</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>93</fpage><lpage>101</lpage><history><date date-type="received" iso-8601-date="2026-09-25"><day>25</day><month>09</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-09-25"><day>25</day><month>09</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, ABV-press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, АБВ-­пресс</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">ABV-press</copyright-holder><copyright-holder xml:lang="ru">АБВ-­пресс</copyright-holder><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0/</ali:license_ref></license></permissions><self-uri xlink:href="https://oncohematology.abvpress.ru/ongm/article/view/1121">https://oncohematology.abvpress.ru/ongm/article/view/1121</self-uri><abstract xml:lang="en"><p><bold>Background</bold>. Pregnancy in patients with Ph-negative myeloproliferative neoplasms (MPN) is often accompanied by complications – both for the mother and the fetus.</p> <p><bold>Aim</bold>.<bold> </bold>To investigate complications and pregnancy outcomes in patients with Ph-negative MPN depending on the nosological form and the therapy administered during the gestational period.</p> <p><bold>Materials and methods</bold>. This retrospective study included 122 women with Ph-negative MPNs (essential thrombocythemia, polycythemia vera, and primary myelofibrosis) followed at the National Medical Research Center for Hematology from 2014 to 2024, with 165 pregnancies recorded. The structure of obstetric complications and pregnancy outcomes depending on the MPN nosological variant and treatment regimen was assessed using data extracted from medical records (outpatient charts, medical histories of childbirth).</p> <p><bold>Results</bold>. The effect of various treatment regimens on the incidence of pregnancy complications was analyzed in 122 patients with Ph-negative myeloproliferative neoplasms of reproductive age, who had a total of 165 pregnancies. In this group, the proportion of pregnancies resulting in live birth was 67.8 %. Among 120 pregnancies prolonged after the first trimester, complications were observed in 72.5 % (87 / 120) of cases. The most common of them were threatened miscarriage (20.8 %), bleeding during pregnancy or childbirth (13.3 %), preeclampsia (9.2 %); the incidence of thrombotic complications was 4.2 %.</p> <p>Multivariate analysis revealed an independent protective effect of low molecular weight heparin: its inclusion in the treatment regimen reduced the probability of pregnancy complications by 68 % (odds ratio (OR) 0.32; 95 % confidence interval 0.12–0.86; p = 0.03). Acetylsalicylic acid and interferon α did not demonstrate a statistically significant independent effect (p = 0.51 and p = 0.69, respectively). In contrast to triple therapy, the interferon α + acetylsalicylic acid combination was associated with a significantly increased risk of complications (OR 3.6; p = 0.05). Other treatment regimens did not show a significant effect on the incidence of pregnancy complications.</p> <p>In polycythemia vera, the three-component treatment regimen showed a tendency to reduce the incidence of pregnancy complications (OR 0.24; p = 0.07), and the results of multivariate analysis confirmed that low molecular weight heparin is the main independent protector (OR 0.31; p = 0.02)</p> <p><bold>Conclusion</bold>. The obtained data substantiate the need for a differentiated approach to choosing a therapeutic strategy in pregnant women with various forms of myeloproliferative neoplasms.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение</bold>. Беременность у пациенток с Ph-негативными миелопролиферативными новообразованиями (МПН) нередко сопровождается осложнениями – как со стороны матери, так и со стороны плода.</p> <p><bold>Цель исследования</bold> – изучить осложнения и исходы беременности у пациенток с Ph-негативными МПН в зависимости от нозологической формы заболевания и проводимой терапии в гестационном периоде.</p> <p><bold>Материалы и методы</bold>.<bold> </bold>В ретроспективное исследование включены 122 женщины с Ph-негативными МПН (эссенциальная тромбоцитемия, истинная полицитемия и первичный миелофиброз), наблюдавшиеся в НМИЦ гематологии с 2014 по 2024 г., у которых зарегистрировано 165 беременностей. Оценку структуры акушерских осложнений и исходов беременностей в зависимости от нозологического варианта МПН и схемы терапии проводили на основе данных, извлеченных из медицинской документации (амбулаторные карты, истории родов).</p> <p><bold>Результаты</bold>. Проанализировано влияние различных схем терапии на частоту осложнений беременности у 122 пациенток с Ph-негативными МПН репродуктивного возраста, которые имели в общей сложности 165 беременностей. В этой группе доля беременностей, завершившихся рождением живого ребенка, составила 67,8 %. Среди 120 беременностей, пролонгированных после I триместра, осложнения наблюдались в 72,5 % (87 / 120) случаев. Наиболее частыми из них были угроза прерывания беременности (20,8 %), кровотечения во время беременности или родов (13,3 %), преэклампсия (9,2 %); частота тромботических осложнений составила 4,2 %.</p> <p>При многофакторном анализе обнаружен независимый протективный эффект низкомолекулярного гепарина: его включение в схему терапии снижало вероятность осложнений беременности на 68 % (отношение шансов (ОШ) 0,32; 95 % доверительный интервал 0,12–0,86; <italic>p</italic> = 0,03). Ацетилсалициловая кислота и интерферон α не продемонстрировали статистически значимого самостоятельного влияния (p = 0,51 и p = 0,69 соответственно). В отличие от тройной терапии, комбинация интерферон α + ацетилсалициловая кислота сопровождалась значимым повышением риска осложнений (ОШ 3,6; p = 0,05). Другие терапевтические схемы не оказали значимого влияния на частоту осложнений беременности.</p> <p>При истинной полицитемии трехкомпонентная схема лечения показала тенденцию к уменьшению частоты осложнений беременности (ОШ 0,24; <italic>p</italic> = 0,07), а результаты многофакторного анализа подтвердили, что основным независимым протектором выступает низкомолекулярный гепарин (ОШ 0,31; <italic>p</italic> = 0,02)</p> <p><bold>Заключение</bold>. Полученные данные обосновывают необходимость дифференцированного подхода к выбору терапевтической стратегии у беременных женщин с различными формами МПН.</p></trans-abstract><kwd-group xml:lang="en"><kwd>myeloproliferative neoplasm</kwd><kwd>essential thrombocythemia</kwd><kwd>polycythemia vera</kwd><kwd>primary myelofibrosis</kwd><kwd>pregnancy complication</kwd><kwd>interferon α</kwd><kwd>low molecular weight heparin</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>миелопролиферативное новообразование</kwd><kwd>эссенциальная тромбоцитемия</kwd><kwd>истинная полицитемия</kwd><kwd>первичный миелофиброз</kwd><kwd>осложнение беременности</kwd><kwd>интерферон α</kwd><kwd>низкомолекулярный гепарин</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Arber D.A., Orazi A., Hasserjian R. et al. The 2016 revision to the World Health Organization classification of myeloid neoplasms and acute leukemia. 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