{"id":16171,"date":"2017-02-13T13:57:00","date_gmt":"2017-02-13T10:57:00","guid":{"rendered":"https:\/\/isida-ivf.com\/depistage-genetique-preimplantatoire-pgd\/"},"modified":"2023-08-24T20:32:30","modified_gmt":"2023-08-24T17:32:30","slug":"depistage-genetique-preimplantatoire-pgd","status":"publish","type":"post","link":"https:\/\/isida-ivf.com\/fr\/depistage-genetique-preimplantatoire-pgd\/","title":{"rendered":"D\u00e9pistage G\u00e9n\u00e9tique pr\u00e9implantatoire (PGD)"},"content":{"rendered":"\n<p>L&rsquo;une des causes les plus fr\u00e9quentes de l&rsquo;absence d&rsquo;implantation d&#8217;embryons, des grossesses pr\u00e9coces gel\u00e9es et de la naissance d&rsquo;enfants atteints de pathologies g\u00e9n\u00e9tiques sont les abr\u00e9gations chromosomiques.<\/p>\n\n<p>L&#8217;embryon normal a 22 paires de chromosomes autosomiques et 1 paire de sexe, dont le chromosome x d\u00e9finit le sexe f\u00e9minin et le chromosome y le sexe masculin. La formation d&rsquo;un nombre incorrect de chromosomes est appel\u00e9e aneuplo\u00efdie: l&rsquo;absence de l&rsquo;un des chromosomes est une monosomie, la pr\u00e9sence d&rsquo;un chromosome suppl\u00e9mentaire est une trisomie.<\/p>\n\n<p>L&rsquo;ovule et le sperme contiennent un ensemble haplo\u00efde de chromosomes &#8211; c&rsquo;est-\u00e0-dire sur un chromosome de 23 paires. Dans ce cas, les aneuplo\u00efdies peuvent se produire \u00e0 la fois dans l&rsquo;ovule et le sperme, ainsi que dans l&#8217;embryon lui-m\u00eame apr\u00e8s la f\u00e9condation.<\/p>\n\n<p>La d\u00e9tection rapide des aneuplo\u00efdies permet aux futurs parents d&rsquo;avoir une grossesse tant attendue et d&rsquo;\u00e9viter d&rsquo;\u00e9ventuels probl\u00e8mes de sant\u00e9 pour le b\u00e9b\u00e9 \u00e0 l&rsquo;avenir. Pour ce faire, de nombreux centres de FIV effectuent un D\u00e9pistage G\u00e9n\u00e9tique Pr\u00e9implantatoire <strong>(PGD<\/strong>). Il vous permet de s\u00e9lectionner des embryons avec un ensemble \u00e9quilibr\u00e9 de chromosomes.<\/p>\n\n<p>L&rsquo;efficacit\u00e9 du PGD d\u00e9pend de la technique utilis\u00e9e. Ainsi, la m\u00e9thode d&rsquo;hybridation par fluorescence (<strong>FISH<\/strong>) permet d&rsquo;analyser plusieurs chromosomes, alors que array-CGH \u2013 tous les 23 chromosomes. Ces m\u00e9thodes conviennent \u00e0 la d\u00e9tection d&rsquo;anomalies chromosomiques telles que la trisomie 21 du chromosome (Syndrome de Down), les d\u00e9l\u00e9tions et les duplications, mais ne sont pas capables de d\u00e9tecter des mutations de g\u00e8nes individuels.<\/p>\n\n<p>Des mutations g\u00e9n\u00e9tiques peuvent \u00eatre \u00e0 l&rsquo;origine de la naissance d&rsquo;un enfant atteint de maladies monog\u00e8nes telles que la fibrose kystique, l&rsquo;atrophie musculaire spinale, l&rsquo;an\u00e9mie de Fanconi, la maladie de gaucher, l&rsquo;H\u00e9mophilie B et bien d&rsquo;autres. Ces maladies ne se manifestent pas toujours au fil des g\u00e9n\u00e9rations et peuvent donc \u00eatre ignor\u00e9es sans analyse pr\u00e9alable d&rsquo;un g\u00e8ne particulier.<\/p>\n\n<p>Une technologie r\u00e9volutionnaire pour l&rsquo;analyse de l&rsquo;information G\u00e9n\u00e9tique est la m\u00e9thode de s\u00e9quen\u00e7age de nouvelle g\u00e9n\u00e9ration(<strong>NGS<\/strong>). Cette m\u00e9thode est sans danger pour l&#8217;embryon, car elle implique une biopsie le cinqui\u00e8me jour de son d\u00e9veloppement, lorsque l&#8217;embryon contient un grand nombre de cellules et que l&rsquo;\u00e9tude est r\u00e9alis\u00e9e sur le trophectoderme. Dans le m\u00eame temps, il est possible de combiner l&rsquo;\u00e9tude des aberrations chromosomiques et des maladies monog\u00e9niques en une seule analyse. La haute pr\u00e9cision de NGS \u00e9vite les r\u00e9sultats faussement positifs et faussement n\u00e9gatifs dans 99.9% des cas.<\/p>\n\n<p>Notre clinique propose toutes les m\u00e9thodes de d\u00e9pistage G\u00e9n\u00e9tique pr\u00e9implantatoire.<br\/>Quand Peut-on vous recommander une PGD:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>\u00c2ge de la future m\u00e8re de plus de 35 ans<\/li>\n\n\n\n<li>Fausse couche habituelle de la grossesse, en particulier dans les premiers stades<\/li>\n\n\n\n<li>Multiples tentatives infructueuses de FIV<\/li>\n\n\n\n<li>Aberrations chromosomiques identifi\u00e9es lors de grossesses ant\u00e9rieures<\/li>\n\n\n\n<li>R\u00e9arrangements chromosomiques ou maladies g\u00e9n\u00e9tiques \/ portage chez le couple.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;une des causes les plus fr\u00e9quentes de l&rsquo;absence d&rsquo;implantation d&#8217;embryons, des grossesses pr\u00e9coces gel\u00e9es et de la naissance d&rsquo;enfants atteints de pathologies g\u00e9n\u00e9tiques sont les abr\u00e9gations chromosomiques. L&#8217;embryon normal a 22 paires de chromosomes autosomiques et 1 paire de sexe, dont le chromosome x d\u00e9finit le sexe f\u00e9minin et le chromosome y le sexe masculin. [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":14960,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[45],"tags":[],"class_list":["post-16171","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classifiee"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>D\u00e9pistage G\u00e9n\u00e9tique pr\u00e9implantatoire (PGD) &#060; ISIDA International<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"D\u00e9pistage G\u00e9n\u00e9tique pr\u00e9implantatoire (PGD) &#060; ISIDA International\" \/>\n<meta property=\"og:description\" content=\"L&rsquo;une des causes les plus fr\u00e9quentes de l&rsquo;absence d&rsquo;implantation d&#8217;embryons, des grossesses pr\u00e9coces gel\u00e9es et de la naissance d&rsquo;enfants atteints de pathologies g\u00e9n\u00e9tiques sont les abr\u00e9gations chromosomiques. L&#8217;embryon normal a 22 paires de chromosomes autosomiques et 1 paire de sexe, dont le chromosome x d\u00e9finit le sexe f\u00e9minin et le chromosome y le sexe masculin. 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