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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">problendo</journal-id><journal-title-group><journal-title xml:lang="ru">Проблемы Эндокринологии</journal-title><trans-title-group xml:lang="en"><trans-title>Problems of Endocrinology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0375-9660</issn><issn pub-type="epub">2308-1430</issn><publisher><publisher-name>Endocrinology Research Centre</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.14341/probl10029</article-id><article-id custom-type="elpub" pub-id-type="custom">problendo-10029</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 Studies</subject></subj-group></article-categories><title-group><article-title>Особенности физического развития детей, рожденных в результате применения вспомогательных репродуктивных технологий</article-title><trans-title-group xml:lang="en"><trans-title>The physical development of children born with the use of assisted reproductive technologies</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6709-8231</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зюзикова</surname><given-names>Зинаида Сергеевна</given-names></name><name name-style="western" xml:lang="en"><surname>Zyuzikova</surname><given-names>Zinaida S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>педиатр-эндокринолог, клинический аспирант </p></bio><bio xml:lang="en"><p>MD</p></bio><email xlink:type="simple">zyuzikova.z.s@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6470-6318</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Волеводз</surname><given-names>Наталья Никитична</given-names></name><name name-style="western" xml:lang="en"><surname>Volevodz</surname><given-names>Natalya N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.м.н., профессор</p></bio><bio xml:lang="en"><p>MD, PhD, Professor</p></bio><email xlink:type="simple">nnvolevodz@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5057-127X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шестакова</surname><given-names>Марина Владимировна</given-names></name><name name-style="western" xml:lang="en"><surname>Shestakova</surname><given-names>Marina V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор медицинских наук, профессор, академик РАН </p></bio><bio xml:lang="en"><p>MD, PhD, Professor</p></bio><email xlink:type="simple">shestakova.mv@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8175-7886</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дедов</surname><given-names>Иван Иванович</given-names></name><name name-style="western" xml:lang="en"><surname>Dedov</surname><given-names>Ivan I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.м.н., профессор, академик РАН</p></bio><bio xml:lang="en"><p>MD, PhD, Professor</p></bio><email xlink:type="simple">dedov@endocrincentr.ru</email><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>&lt;p&gt;Первый Московский государственный медицинский университет им. И.М. Сеченова&lt;/p&gt;</institution><country>Россия</country></aff><aff xml:lang="en"><institution>&lt;p&gt;I.M. Sechenov First Moscow State Medical University (Sechenov University)&lt;/p&gt;</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>&lt;p&gt;ФГБУ &amp;laquo;Национальный медицинский исследовательский центр эндокринологии&amp;raquo; Минздрава России&lt;/p&gt;</institution><country>Россия</country></aff><aff xml:lang="en"><institution>&lt;p&gt;Endocrinology Research Centre,&lt;/p&gt;</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>&lt;p&gt;ФГБУ &amp;laquo;Национальный медицинский исследовательский центр эндокринологии&amp;raquo; Минздрава России&lt;/p&gt;</institution><country>Россия</country></aff><aff xml:lang="en"><institution>&lt;p&gt;Endocrinology Research Centre&lt;/p&gt;</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>&lt;p&gt;Первый Московский государственный медицинский университет им. И.М. Сеченова; Национальный медицинский исследовательский центр эндокринологии&lt;/p&gt;</institution><country>Россия</country></aff><aff xml:lang="en"><institution>&lt;p&gt;I.M. Sechenov First Moscow State Medical University (Sechenov University); Endocrinology Research Centre&lt;/p&gt;</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>12</day><month>09</month><year>2019</year></pub-date><volume>65</volume><issue>3</issue><fpage>148</fpage><lpage>154</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Зюзикова З.С., Волеводз Н.Н., Шестакова М.В., Дедов И.И., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Зюзикова З.С., Волеводз Н.Н., Шестакова М.В., Дедов И.И.</copyright-holder><copyright-holder xml:lang="en">Zyuzikova Z.S., Volevodz N.N., Shestakova M.V., Dedov I.I.</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://www.probl-endojournals.ru/jour/article/view/10029">https://www.probl-endojournals.ru/jour/article/view/10029</self-uri><abstract><sec><title>Обоснование</title><p>Обоснование. Около 0,1% населения Земли рождены при помощи вспомогательных репродуктивных технологий (ВРТ). В нашей стране, по данным Национального регистра ВРТ, таких детей рождается около 1,5% ежегодно. Несмотря на столь высокий процент данные о состоянии физического развития детей, рожденных с помощью ВРТ, носят противоречивый характер.</p><p>Цель – сравнить клинико-антропометрические показатели детей, рожденных при помощи ВРТ, с таковыми у детей, зачатых естественным путем, в разных возрастных группах.</p></sec><sec><title>Материал и метод</title><p>Материал и метод. В исследование включены 88 детей, рожденных в результате применения ВРТ (группа 1), и 117 детей, зачатых естественным путем (группа 2). Показатели оценивали с момента рождения до наступления пубертата. Анализировались антропометрические данные в обеих группах с учетом фактора многоплодной беременности: рост, SDS роста, масса тела, SDS массы тела, индекс массы тела (ИМТ), SDS ИМТ при рождении и на момент осмотра ребенка. Определяли также уровни инсулиноподобного фактора роста-1 (SDS ИФР-1) у детей обеих групп.</p></sec><sec><title>Результаты</title><p>Результаты. SDS роста и SDS массы тела у детей, рожденных от одноплодной беременности, при рождении в группе 1 составили 0,82 [0,1;1,83] и 0,17 [–0,53;0,9], а в группе 2 – 0,5 [–0,35;1,75] и –0,11 [–0,94;0,635] (р=0,62 и 0,37 соответственно). У детей в возрасте до 1 года, с 1 года до 3 лет и с 3 до 11 лет разницы в показателях SDS роста и SDS ИМТ выявлено не было (р=0,3 и 0,9; р=0,29 и 0,29; р=0,85 и 0,6 соответственно).</p></sec><sec><title>Заключение</title><p>Заключение. Дети, рожденные от одноплодной беременности в обеих группах, были сопоставимы по весоростовым показателям как при рождении (с поправкой на гестационный возраст), так и в разные возрастные периоды. Уровни ИФР-1 у детей, рожденных в результате применения ВРТ, не отличались от таковых у детей, зачатых естественным путем.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>BACKGROUND</title><p>BACKGROUND. Today, about 0.1% of the world’s population is born using assisted reproductive technology (ART). According to the National Register of ART, in our country these children represent approximately 1.5% of all children born annually. Despite such a high percentage, data on the physical development of children born using ART is contradictory.</p></sec><sec><title>AIMS</title><p>AIMS. The aim of the study is to compare the clinical and anthropometric measurements of children born with the help of ART with those of children conceived naturally, in different age groups.</p></sec><sec><title>MATERIAL AND METHODS</title><p>MATERIAL AND METHODS. The study included 88 children born as the result of the use of ART (Group 1) and 117 children conceived naturally (Group 2). Statistical indicators were evaluated from birth to the onset of puberty. Anthropometric measurements for both groups were analyzed, factoring for multiple pregnancy: length/height, SDS length/height, body weight, SDS body weight, body mass index (BMI), and SDS BMI, at birth and at the times of examination of each child. The levels of insulin-like growth factor-1 (SDS IGF-1) in children of both groups were also determined.</p></sec><sec><title>RESULTS</title><p>RESULTS. SDS length and SDS weight at birth in children born to a singleton pregnancy were 0.82 [0.1; 1.83] and 0.17 [–0.53; 0.9] in Group 1, and 0.5 [–0.35; 1.75] and –0.11 [–0.94; 0.635] in Group 2 (p = 0.62 and 0.37, respectively). In children less than 1 year of age, 1 year to 3 years, and 3 to 11 years, there was no difference of SDS length/height and SDS BMI (p = 0.3 and 0.9; p=0.29 and 0.29; p=0.85 and 0.6, respectively).</p></sec><sec><title>CONCLUSION</title><p>CONCLUSION. Children born from a singleton pregnancy in both groups were comparable in terms of anthropometric measurements both at birth (adjusted for gestational age), and at different ages. The levels of IGF-1 in children born as a result of the use of ART did not differ from those in children conceived naturally.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>вспомогательные репродуктивные технологии</kwd><kwd>дети</kwd><kwd>физическое развитие</kwd><kwd>рост</kwd><kwd>масса тела</kwd><kwd>ИМТ</kwd><kwd>SDS ИФР-1</kwd></kwd-group><kwd-group xml:lang="en"><kwd>assisted reproductive technologies</kwd><kwd>children</kwd><kwd>physical development</kwd><kwd>length/height</kwd><kwd>weight</kwd><kwd>BMI</kwd><kwd>SDS IGF-1</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">Faddy MJ, Gosden MD, Gosden RG. A demographic projection of the contribution of assisted reproductive technologies to world population growth. Reprod Biomed Online. 2018;36(4):455-458. doi: https://doi.org/10.1016/j.rbmo.2018.01.006</mixed-citation><mixed-citation xml:lang="en">Faddy MJ, Gosden MD, Gosden RG. A demographic projection of the contribution of assisted reproductive technologies to world population growth. Reprod Biomed Online. 2018;36(4):455-458. doi: https://doi.org/10.1016/j.rbmo.2018.01.006</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Belva F, Henriet S, Liebaers I, et al. Medical outcome of 8-year-old singleton ICSI children (born &gt;or=32 weeks’ gestation) and a spontaneously conceived comparison group. Hum Reprod. 2007;22(2):506-515. doi: https://doi.org/10.1093/humrep/del372</mixed-citation><mixed-citation xml:lang="en">Belva F, Henriet S, Liebaers I, et al. Medical outcome of 8-year-old singleton ICSI children (born &gt;or=32 weeks’ gestation) and a spontaneously conceived comparison group. Hum Reprod. 2007;22(2):506-515. doi: https://doi.org/10.1093/humrep/del372</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Lu YH, Wang N, Jin F. Long-term follow-up of children conceived through assisted reproductive technology. J Zhejiang Univ Sci B. 2013;14(5):359-371. doi: https://doi.org/10.1631/jzus.B1200348</mixed-citation><mixed-citation xml:lang="en">Lu YH, Wang N, Jin F. Long-term follow-up of children conceived through assisted reproductive technology. J Zhejiang Univ Sci B. 2013;14(5):359-371. doi: https://doi.org/10.1631/jzus.B1200348</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Koivurova S, Hartikainen AL, Gissler M, et al. Post-neonatal hospitalization and health care costs among IVF children: a 7-year follow-up study. Hum Reprod. 2007;22(8):2136-2141. doi: https://doi.org/10.1093/humrep/dem150</mixed-citation><mixed-citation xml:lang="en">Koivurova S, Hartikainen AL, Gissler M, et al. Post-neonatal hospitalization and health care costs among IVF children: a 7-year follow-up study. Hum Reprod. 2007;22(8):2136-2141. doi: https://doi.org/10.1093/humrep/dem150</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Kai CM, Main KM, Andersen AN, et al. Serum insulin-like growth factor-I (IGF-I) and growth in children born after assisted reproduction. J Clin Endocrinol Metab. 2006;91(11):4352-4360. doi: https://doi.org/10.1210/jc.2006-0701</mixed-citation><mixed-citation xml:lang="en">Kai CM, Main KM, Andersen AN, et al. Serum insulin-like growth factor-I (IGF-I) and growth in children born after assisted reproduction. J Clin Endocrinol Metab. 2006;91(11):4352-4360. doi: https://doi.org/10.1210/jc.2006-0701</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Ceelen M, van Weissenbruch MM, Prein J, et al. Growth during infancy and early childhood in relation to blood pressure and body fat measures at age 8-18 years of IVF children and spontaneously conceived controls born to subfertile parents. Hum Reprod. 2009;24(11):2788-2795. doi: https://doi.org/10.1093/humrep/dep273</mixed-citation><mixed-citation xml:lang="en">Ceelen M, van Weissenbruch MM, Prein J, et al. Growth during infancy and early childhood in relation to blood pressure and body fat measures at age 8-18 years of IVF children and spontaneously conceived controls born to subfertile parents. Hum Reprod. 2009;24(11):2788-2795. doi: https://doi.org/10.1093/humrep/dep273</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Meddeb L, Pauly V, Boyer P, et al. Longitudinal growth of French singleton children born after in vitro fertilization and intracytoplasmic sperm injection. Body mass index up to 5 years of age. Rev Epidemiol Sante Publique. 2017;65(3):197-208. doi: https://doi.org/10.1016/j.respe.2017.03.001</mixed-citation><mixed-citation xml:lang="en">Meddeb L, Pauly V, Boyer P, et al. Longitudinal growth of French singleton children born after in vitro fertilization and intracytoplasmic sperm injection. Body mass index up to 5 years of age. Rev Epidemiol Sante Publique. 2017;65(3):197-208. doi: https://doi.org/10.1016/j.respe.2017.03.001</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Lofqvist C, Andersson E, Gelander L, et al. Reference values for IGF-I throughout childhood and adolescence: a model that accounts simultaneously for the effect of gender, age, and puberty. J Clin Endocrinol Metab. 2001;86(12):5870-5876. doi: https://doi.org/10.1210/jcem.86.12.8117</mixed-citation><mixed-citation xml:lang="en">Lofqvist C, Andersson E, Gelander L, et al. Reference values for IGF-I throughout childhood and adolescence: a model that accounts simultaneously for the effect of gender, age, and puberty. J Clin Endocrinol Metab. 2001;86(12):5870-5876. doi: https://doi.org/10.1210/jcem.86.12.8117</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Chen M, Heilbronn LK. The health outcomes of human offspring conceived by assisted reproductive technologies (ART). J Dev Orig Health Dis. 2017;8(4):388-402. doi: https://doi.org/10.1017/S2040174417000228</mixed-citation><mixed-citation xml:lang="en">Chen M, Heilbronn LK. The health outcomes of human offspring conceived by assisted reproductive technologies (ART). J Dev Orig Health Dis. 2017;8(4):388-402. doi: https://doi.org/10.1017/S2040174417000228</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Miles HL, Hofman PL, Peek J, et al. In vitro fertilization improves childhood growth and metabolism. J Clin Endocrinol Metab. 2007;92(9):3441-3445. doi: https://doi.org/10.1210/jc.2006-2465</mixed-citation><mixed-citation xml:lang="en">Miles HL, Hofman PL, Peek J, et al. In vitro fertilization improves childhood growth and metabolism. J Clin Endocrinol Metab. 2007;92(9):3441-3445. doi: https://doi.org/10.1210/jc.2006-2465</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Green MP, Mouat F, Miles HL et al. Anthropometric and endocrine differences exist between children conceived after the transfer of a fresh or thawed embryo compared to naturally conceived controls. Aust N Z J Obstet Gynaecol. 2010;50:25.</mixed-citation><mixed-citation xml:lang="en">Green MP, Mouat F, Miles HL et al. Anthropometric and endocrine differences exist between children conceived after the transfer of a fresh or thawed embryo compared to naturally conceived controls. Aust N Z J Obstet Gynaecol. 2010;50:25.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Амирова А.А., Назаренко Т.А., Мишиева Н.Г. Факторы, влияющие на исходы ЭКО (обзор литературы). // Проблемы репродукции. – 2010. – №1. – С. 68-74. [Amirova AA, Nazarenko TA, Mishieva NG. Factors influencing the IVF outcome (a review Modern reproductive technologies. 2010;(1):68-74. (In Russ.)]</mixed-citation><mixed-citation xml:lang="en">Амирова А.А., Назаренко Т.А., Мишиева Н.Г. Факторы, влияющие на исходы ЭКО (обзор литературы). // Проблемы репродукции. – 2010. – №1. – С. 68-74. [Amirova AA, Nazarenko TA, Mishieva NG. Factors influencing the IVF outcome (a review Modern reproductive technologies. 2010;(1):68-74. (In Russ.)]</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Современные медико-социальные проблемы неонатологии. / Под ред. Баранова А.А., Яцык Г.В. – М.: ПедиатрЪ, 2014. [Baranov AA, Yatsyk GV, editors. Sovremennye mediko-sotsial’nye problemy neonatologii. Moscow: Pediatr; 2014. (In Russ.)]</mixed-citation><mixed-citation xml:lang="en">Современные медико-социальные проблемы неонатологии. / Под ред. Баранова А.А., Яцык Г.В. – М.: ПедиатрЪ, 2014. [Baranov AA, Yatsyk GV, editors. Sovremennye mediko-sotsial’nye problemy neonatologii. Moscow: Pediatr; 2014. (In Russ.)]</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Klemetti R, Sevon T, Gissler M, Hemminki E. Health of children born after ovulation induction. Fertil Steril. 2010;93(4):1157-1168. doi: https://doi.org/10.1016/j.fertnstert.2008.12.025</mixed-citation><mixed-citation xml:lang="en">Klemetti R, Sevon T, Gissler M, Hemminki E. Health of children born after ovulation induction. Fertil Steril. 2010;93(4):1157-1168. doi: https://doi.org/10.1016/j.fertnstert.2008.12.025</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Ombelet W, Martens G, De Sutter P, et al. Perinatal outcome of 12,021 singleton and 3108 twin births after non-IVF-assisted reproduction: a cohort study. Hum Reprod. 2006;21(4):1025-1032. doi: https://doi.org/10.1093/humrep/dei419</mixed-citation><mixed-citation xml:lang="en">Ombelet W, Martens G, De Sutter P, et al. Perinatal outcome of 12,021 singleton and 3108 twin births after non-IVF-assisted reproduction: a cohort study. Hum Reprod. 2006;21(4):1025-1032. doi: https://doi.org/10.1093/humrep/dei419</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Barker DJP. Fetal origins of cardiovascular disease. Ann Med. 1999;31(sup1):3-6. doi: https://doi.org/10.1080/07853890.1999.11904392</mixed-citation><mixed-citation xml:lang="en">Barker DJP. Fetal origins of cardiovascular disease. Ann Med. 1999;31(sup1):3-6. doi: https://doi.org/10.1080/07853890.1999.11904392</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Giorgetti C, Vanden Meerschaut F, De Roo C, et al. Multivariate analysis identifies the estradiol level at ovulation triggering as an independent predictor of the first trimester pregnancy-associated plasma protein-A level in IVF/ICSI pregnancies. Hum Reprod. 2013;28(10):2636-2642. doi: https://doi.org/10.1093/humrep/det295</mixed-citation><mixed-citation xml:lang="en">Giorgetti C, Vanden Meerschaut F, De Roo C, et al. Multivariate analysis identifies the estradiol level at ovulation triggering as an independent predictor of the first trimester pregnancy-associated plasma protein-A level in IVF/ICSI pregnancies. Hum Reprod. 2013;28(10):2636-2642. doi: https://doi.org/10.1093/humrep/det295</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Wennerholm UB, Henningsen AK, Romundstad LB, et al. Perinatal outcomes of children born after frozen-thawed embryo transfer: a Nordic cohort study from the CoNARTaS group. Hum Reprod. 2013;28(9):2545-2553. doi: https://doi.org/10.1093/humrep/det272</mixed-citation><mixed-citation xml:lang="en">Wennerholm UB, Henningsen AK, Romundstad LB, et al. Perinatal outcomes of children born after frozen-thawed embryo transfer: a Nordic cohort study from the CoNARTaS group. Hum Reprod. 2013;28(9):2545-2553. doi: https://doi.org/10.1093/humrep/det272</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Vidal M, Vellve K, Gonzalez-Comadran M, et al. Perinatal outcomes in children born after fresh or frozen embryo transfer: a Catalan cohort study based on 14,262 newborns. Fertil Steril. 2017; 107(4):940-947. doi: https://doi.org/10.1016/j.fertnstert.2017.01.021</mixed-citation><mixed-citation xml:lang="en">Vidal M, Vellve K, Gonzalez-Comadran M, et al. Perinatal outcomes in children born after fresh or frozen embryo transfer: a Catalan cohort study based on 14,262 newborns. Fertil Steril. 2017; 107(4):940-947. doi: https://doi.org/10.1016/j.fertnstert.2017.01.021</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Ishihara O, Araki R, Kuwahara A, et al. Impact of frozen-thawed single-blastocyst transfer on maternal and neonatal outcome: an analysis of 277,042 single-embryo transfer cycles from 2008 to 2010 in Japan. Fertil Steril. 2014;101(1):128-133. doi: https://doi.org/10.1016/j.fertnstert.2013.09.025</mixed-citation><mixed-citation xml:lang="en">Ishihara O, Araki R, Kuwahara A, et al. Impact of frozen-thawed single-blastocyst transfer on maternal and neonatal outcome: an analysis of 277,042 single-embryo transfer cycles from 2008 to 2010 in Japan. Fertil Steril. 2014;101(1):128-133. doi: https://doi.org/10.1016/j.fertnstert.2013.09.025</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Luke B. Pregnancy and birth outcomes in couples with infertility with and without assisted reproductive technology: with an emphasis on US population-based studies. Am J Obstet Gynecol. 2017;217(3):270-281. doi: https://doi.org/10.1016/j.ajog.2017.03.012</mixed-citation><mixed-citation xml:lang="en">Luke B. Pregnancy and birth outcomes in couples with infertility with and without assisted reproductive technology: with an emphasis on US population-based studies. Am J Obstet Gynecol. 2017;217(3):270-281. doi: https://doi.org/10.1016/j.ajog.2017.03.012</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
