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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Morphology</journal-id><journal-title-group><journal-title xml:lang="en">Morphology</journal-title><trans-title-group xml:lang="ru"><trans-title>Морфология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1026-3543</issn><issn publication-format="electronic">2949-2556</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">399514</article-id><article-id pub-id-type="doi">10.17816/morph.399514</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">MORPHOGENESIS ОF HUMAN PLACENTA IN THE FIRST TRIMESTER OF GESTATION</article-title><trans-title-group xml:lang="ru"><trans-title>МОРФОГЕНЕЗ ПЛАЦЕНТЫ ЧЕЛОВЕКА В I ТРИМЕСТРЕ БЕРЕМЕННОСТИ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Milovanov</surname><given-names>A P</given-names></name><name xml:lang="ru"><surname>Милованов</surname><given-names>А П</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лаборатория патологии женской репродуктивной системы (зав. - проф. А.П. Милованов); Научно-исследовательский институт морфологии человека РАМН</p></bio><email>a_p_milovanov@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Erofeeva</surname><given-names>L M</given-names></name><name xml:lang="ru"><surname>Ерофеева</surname><given-names>Л М</given-names></name></name-alternatives><bio xml:lang="ru"><p>кафедра гистологии, эмбриологии, цитологии (зав. - проф. Л.М. Ерофеева); Московский государственный медико-стоматологический университет</p></bio><email>gystology@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zolotukhina</surname><given-names>I A</given-names></name><name xml:lang="ru"><surname>Золотухина</surname><given-names>И А</given-names></name></name-alternatives><bio xml:lang="ru"><p>кафедра гистологии, эмбриологии, цитологии (зав. - проф. Л.М. Ерофеева); Московский государственный медико-стоматологический университет</p></bio><email>gystology@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Aleksandrovich</surname><given-names>N V</given-names></name><name xml:lang="ru"><surname>Александрович</surname><given-names>Н В</given-names></name></name-alternatives><bio xml:lang="ru"><p>кафедра гистологии, эмбриологии, цитологии (зав. - проф. Л.М. Ерофеева); Московский государственный медико-стоматологический университет</p></bio><email>gystology@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name><surname>Milovanov</surname><given-names>A P</given-names></name><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name><surname>Yerofeyeva</surname><given-names>L M</given-names></name><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name><surname>Zolotukhina</surname><given-names>I A</given-names></name><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name><surname>Aleksandrovich</surname><given-names>N V</given-names></name><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en"></institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт морфологии человека РАМН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en"></institution></aff><aff><institution xml:lang="ru">Московский государственный медико-стоматологический университет</institution></aff></aff-alternatives><aff id="aff3"><institution></institution></aff><pub-date date-type="pub" iso-8601-date="2011-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2011</year></pub-date><volume>139</volume><issue>2</issue><issue-title xml:lang="en">NO2 (2011)</issue-title><issue-title xml:lang="ru">№2 (2011)</issue-title><fpage>72</fpage><lpage>76</lpage><history><date date-type="received" iso-8601-date="2023-05-09"><day>09</day><month>05</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2011, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2011, Эко-Вектор</copyright-statement><copyright-year>2011</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://j-morphology.com/1026-3543/article/view/399514">https://j-morphology.com/1026-3543/article/view/399514</self-uri><abstract xml:lang="en"><p>On the basis of morphometric and immunohistochemical study of placental villi obtained from 45 cases of medicinal and medical abortions in healthy women, the new data on placentation are presented with the discrimination of three stages of placental morphogenesis. The first stage (weeks 4 and 5 after fertilization) included a differentiation of villous chorion (chorion frondosum). It was characterized by high mitotic activity of villous cytotrophoblast and intensive vasculogenesis in the villous stroma. The second stage (weeks 6 and 7) included capillary development (angiogenesis) and formation of vascular communications within a «placenta-embryo» subsystem functioning in low-oxygen level environment. The third stage (weeks 8 and 9-10) was characterized by vascular bed formation in «mother-placenta» subsystem and by the beginning of more effective hemochorial embryo and fetal metabolism. As a result of placentation, hemodynamics formation in «mother-placenta-embryo» system was completed, which is a necessary condition for further fetal development.</p></abstract><trans-abstract xml:lang="ru"><p>На основании морфометрического и иммуногистохимического изучения ворсин плаценты, полученной после лекарственных и медицинских абортов у 45 здоровых женщин, представлены новые данные о плацентации с выделением трех этапов морфогенеза плаценты. Первый этап (4-я и 5-я недели после оплодотворения) - это дифференцировка ворсинчатого хориона. Для него характерны высокая митотическая активность цитотрофобласта ворсин и интенсивный васкулогенез в их строме. Второй этап (6-я и 7-я недели) - это капилляризация ворсин (ангиогенез) и формирование сосудистых связей в подсистеме «плацента - эмбрион», функционирующей в низкокислородном окружении. Третий этап (8-я и 9-10-я недели) - это становление сосудистого русла в подсистеме «мать - плацента» и начало более эффективного гемохориального обмена эмбриона и плода. В итоге плацентации завершается формирование гемодинамики в системе «мать - плацента - эмбрион» как необходимое условие дальнейшего развития плода.</p></trans-abstract><kwd-group xml:lang="en"><kwd>human placenta</kwd><kwd>morphogenesis</kwd><kwd>epithelium</kwd><kwd>vasculogenesis</kwd><kwd>angiogenesis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>плацента человека</kwd><kwd>морфогенез</kwd><kwd>эпителий</kwd><kwd>васкулогенез</kwd><kwd>ангиогенез</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Милованов А.П. Патология системы мать-плацента-плод. М., Медицина, 1999.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Милованов А.П. и Савельев С.В. Внутриутробное развитие человека. 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