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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">ymj</journal-id><journal-title-group><journal-title xml:lang="ru">Якутский медицинский журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Yakut Medical Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1813-1905</issn><issn pub-type="epub">2312-1017</issn><publisher><publisher-name>ЯНЦ КМП</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25789/YMJ.2025.92.02</article-id><article-id custom-type="elpub" pub-id-type="custom">ymj-3044</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL RESEARCH</subject></subj-group></article-categories><title-group><article-title>Гистологические изменения плаценты при хронической субкомпенсированной плацентарной недостаточности у женщин с COVID-19 средней степени тяжести во втором и в третьем триместрах беременности</article-title><trans-title-group xml:lang="en"><trans-title>Histologic changes of the placenta in chronic subcompensated placental insufficiency in women with COVID-19 of moderate severity in the second and third trimesters of pregnancy</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0212-0201</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Андриевская</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Andrievskaya</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Андриевская Ирина Анатольевна – д.б.н., зав. лаб.</p><p>675000, Благовещенск, ул. Калинина, 22</p></bio><email xlink:type="simple">irina-andrievskaja@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-9893-2799</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чурикова</surname><given-names>Т. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Churikova</surname><given-names>T. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чурикова Татьяна Сергеевна – м.н.с.</p><p>675000, Благовещенск, ул. Калинина, 22</p></bio><email xlink:type="simple">churikova97@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8895-3943</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кутепова</surname><given-names>О. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Kutepova</surname><given-names>O. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кутепова Ольга Леонидовна – к.б.н., н.с.</p><p>675000, Благовещенск, ул. Калинина, 22</p></bio><email xlink:type="simple">helga1509_84@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>ФГБНУ «Дальневосточный научный центр физиологии и патологии дыхания»</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>30</day><month>12</month><year>2025</year></pub-date><volume>0</volume><issue>4</issue><fpage>13</fpage><lpage>17</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Андриевская И.А., Чурикова Т.С., Кутепова О.Л., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Андриевская И.А., Чурикова Т.С., Кутепова О.Л.</copyright-holder><copyright-holder xml:lang="en">Andrievskaya I.A., Churikova T.S., Kutepova O.L.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://ymj.elpub.ru/jour/article/view/3044">https://ymj.elpub.ru/jour/article/view/3044</self-uri><abstract><p>Проведено гистологическое изучение тканей плаценты у женщин с хронической субкомпенсированной плацентарной недостаточностью, ассоциированной с COVID-19 средней степени тяжести. Исследование позволило выявить следующие нехарактерные специфические признаки вирусного повреждения тканей: децидуальная васкулопатия, лимфоплазмоцитарная инфильтрация, тромбы в венозных сосудах стволовых ворсин, виллит и интервиллузит, отложение межворсинчатого фибриноида, гиперплазия синцитиотрофобласта и хорангиоз. Морфометрический анализ показал повышение доли периворсинкового фибрина и капилляров в терминальных ворсинах, снижение плотности синцитиокапиллярных мембран. Дополнительно установлено увеличение количества синцитиальных узелков и промежуточных незрелых ворсин, а также полнокровие капилляров в промежуточных и терминальных ворсинах. Среднетяжелое течение COVID-19 во втором и в третьем триместрах беременности ассоциируется со структурными изменениями в плаценте, которые при недостаточной эффективности компенсаторно-приспособительных механизмов являются одной из причин развития хронической субкомпенсированной плацентарной недостаточности</p></abstract><trans-abstract xml:lang="en"><p>The histologic study of placental tissues in women with subcompensated chronic placental insufficiency associated with moderate COVID-19 was conducted. Histologic study of placenta from women of the main group revealed the following uncharacteristic specific signs of viral tissue damage: decidual vasculopathy, lymphoplasmacytic infiltration, thrombi in the venous vessels of the stem villi, villitis and intervillusitis, deposition of intervillous fibrinoid, hyperplasia of syncytiotrophoblast and chorangiosis. Morphometric analysis showed an increase in the proportion of perivorsinchal fibrin and capillaries in terminal villi, and a decrease in the density of syncytiotrophoblast membranes. In addition, an increase in the number of syncytial nodules and intermediate immature villi, as well as capillary bleeding in intermediate and terminal villi were found. The moderately severe course of COVID-19 in the second and third trimesters of pregnancy is associated with structural changes in the placenta, which, with insufficient efficiency of compensatory and adaptive mechanisms, is one of the causes of the development of subcompensated chronic placental insufficiency.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>беременность</kwd><kwd>COVID-19</kwd><kwd>хроническая субкомпенсированная плацентарная недостаточность</kwd><kwd>гистология плаценты</kwd><kwd>морфометрия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>pregnancy</kwd><kwd>COVID-19</kwd><kwd>chronic placental insufficiency</kwd><kwd>placental histology</kwd><kwd>morphometry</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Андриевская И.А., Лязгиян К.С. 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