{"id":64410,"date":"2023-06-22T17:14:40","date_gmt":"2023-06-22T15:14:40","guid":{"rendered":"https:\/\/fertilab.com\/?p=64410"},"modified":"2023-11-10T10:13:41","modified_gmt":"2023-11-10T09:13:41","slug":"corps-jaune-et-grossesse","status":"publish","type":"post","link":"https:\/\/fertilab.com\/fr\/corps-jaune-et-grossesse\/","title":{"rendered":"Corps jaune et grossesse"},"content":{"rendered":"<h2><span class=\"ez-toc-section\" id=\"Corps_jaune_et_ovulation\"><\/span>Corps jaune et ovulation<span class=\"ez-toc-section-end\"><\/span><\/h2><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u00cdndice de contenidos<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69e01fb095fcf\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69e01fb095fcf\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/fertilab.com\/fr\/corps-jaune-et-grossesse\/#Corps_jaune_et_ovulation\" >Corps jaune et ovulation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/fertilab.com\/fr\/corps-jaune-et-grossesse\/#Grossesse_et_corps_jaune\" >Grossesse et corps jaune<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/fertilab.com\/fr\/corps-jaune-et-grossesse\/#Corps_jaune_gravidique\" >Corps jaune gravidique<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/fertilab.com\/fr\/corps-jaune-et-grossesse\/#Supplementation_luteale\" >Suppl\u00e9mentation lut\u00e9ale<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/fertilab.com\/fr\/corps-jaune-et-grossesse\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Une fois l&rsquo;ovulation pass\u00e9e, le <a href=\"https:\/\/fertilab.com\/fr\/que-sont-les-follicules-ovariens\/\">follicule<\/a> se transforme en <strong>corps jaune<\/strong>. La formation du corps jaune d\u00e9pend en effet du subtil \u00e9quilibre hormonal qui se cr\u00e9e : le pic pr\u00e9ovulatoire de LH joue un r\u00f4le central.<\/p>\n<p>Une fois la rupture du follicule et l&rsquo;expulsion de l&rsquo;ovocyte, le corps jaune se forme : les cellules de la granulosa commencent \u00e0 accumuler des prot\u00e9ines, des lipides et de la lut\u00e9ine, un pigment jaun\u00e2tre, et la riche vascularisation permet l&rsquo;arriv\u00e9e du cholest\u00e9rol n\u00e9cessaire \u00e0 la synth\u00e8se de la progest\u00e9rone. Le corps jaune est charg\u00e9 de produire de la <strong>progest\u00e9rone<\/strong>, v\u00e9ritable marqueur du processus d&rsquo;ovulation, en quantit\u00e9 de 8-10 ng\/L, avec un pic au 7-8\u00b0 jour.<\/p>\n<p>Cette hormone reste \u00e9lev\u00e9e avec une production constante jusqu&rsquo;\u00e0 12-14 jours apr\u00e8s l&rsquo;ovulation et a une action de blocage sur l&rsquo;hypothalamus et de r\u00e9duction de la r\u00e9activit\u00e9 des cellules granulaires \u00e0 la LH. Ce dernier m\u00e9canisme conduit en environ 2 semaines \u00e0 la d\u00e9gradation et \u00e0 la disparition du corps jaune. Ceci est le cours des \u00e9v\u00e9nements dans une phase normale de cycle menstruel, sans grossesse.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Grossesse_et_corps_jaune\"><\/span>Grossesse et corps jaune<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Si la grossesse s&rsquo;installe, une structure se forme pr\u00e9cocement qui s\u00e9cr\u00e8te l&rsquo;hormone gonadotropine chorionique humaine ou <a href=\"https:\/\/fertilab.com\/fr\/beta-hcg\/\">beta hCG<\/a> (mesur\u00e9e dans les tests de grossesse), avec une action semblable \u00e0 celle de la LH et le maintien du corps jaune, responsable du contr\u00f4le endocrinien de la grossesse au premier trimestre. \u00c0 partir de la 11\u00b0-12\u00b0 semaine, le contr\u00f4le passe au placenta.<\/p>\n<p>Comprendre la physiologie et le r\u00f4le biologique du corps jaune dans la vie fertile d&rsquo;une femme est fondamental, non seulement \u00e0 la lumi\u00e8re de possibles tentatives de grossesse naturelle, mais aussi et surtout dans le cas o\u00f9 l&rsquo;on choisirait de recourir \u00e0 des m\u00e9thodes de procr\u00e9ation m\u00e9dicalement assist\u00e9e.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Corps_jaune_gravidique\"><\/span>Corps jaune gravidique<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Normalement, la progest\u00e9rone est produite par le corps jaune gravidique, qui ne meurt pas car il est soutenu par l&rsquo;HCG synth\u00e9tis\u00e9e par l&#8217;embryon. Il est consid\u00e9r\u00e9 comme l&rsquo;hormone par excellence li\u00e9e \u00e0 la reproduction, car il d\u00e9termine :<\/p>\n<ul>\n<li>la transformation s\u00e9cr\u00e9toire des \u00e9l\u00e9ments glandulaires de l&rsquo;endom\u00e8tre ;<\/li>\n<li>la d\u00e9cidualisation du stroma : c&rsquo;est-\u00e0-dire la pr\u00e9paration de l&rsquo;endom\u00e8tre \u00e0 accueillir l&#8217;embryon \u00e0 venir ;<\/li>\n<li>la prolif\u00e9ration vasculaire et l&rsquo;implantation de la blastocyste ;<\/li>\n<li>l&rsquo;hyper-polarisation des fibres musculaires, r\u00e9duisant la possibilit\u00e9 de contraction : cela emp\u00eache que des contractions soudaines et excessives puissent entra\u00eener un \u00e9chec de la phase d&rsquo;implantation et donc une fausse couche spontan\u00e9e ;<\/li>\n<li>le soutien hormonal fondamental pour le maintien de la grossesse dans ses premi\u00e8res phases.<\/li>\n<\/ul>\n<p>Par cons\u00e9quent, tout d\u00e9faut dans la fonction du corps jaune peut avoir un impact n\u00e9gatif sur la maturit\u00e9 endom\u00e9triale et sa capacit\u00e9 \u00e0 soutenir la grossesse dans ses phases initiales.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Supplementation_luteale\"><\/span>Suppl\u00e9mentation lut\u00e9ale<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Il peut sembler contre-intuitif de faire une suppl\u00e9mentation lut\u00e9ale, car de <a href=\"https:\/\/fertilab.com\/fr\/que-sont-les-follicules-ovariens\/\">nombreux follicules ont ovul\u00e9<\/a> (et en effet, les avortements dus \u00e0 l&rsquo;insuffisance lut\u00e9ale ne repr\u00e9sentent que 8 %) et donc une bonne quantit\u00e9 de progest\u00e9rone devrait \u00eatre produite. Cependant, la suppl\u00e9mentation a des raisons bien pr\u00e9cises :<\/p>\n<ul>\n<li>On ne peut pas \u00eatre certain a priori de la quantit\u00e9 de progest\u00e9rone produite par les corps jaunes ; donc, on pr\u00e9f\u00e8re avoir un degr\u00e9 de certitude plus \u00e9lev\u00e9 avec la suppl\u00e9mentation ;<\/li>\n<li>Les niveaux \u00e9lev\u00e9s d&rsquo;estradiol en phase lut\u00e9ale \u00e0 cause des cycles de stimulation ovarienne ont un effet n\u00e9gatif sur la r\u00e9ceptivit\u00e9 endom\u00e9triale ;<\/li>\n<li>L&rsquo;utilisation d&rsquo;analogues du GnRH entra\u00eene une inhibition prolong\u00e9e de la fonction hypophysaire, privant le corps jaune de son soutien physiologique.<\/li>\n<\/ul>\n<p>L&rsquo;administration peut \u00eatre orale, intramusculaire, transdermique ou vaginale (forme la plus utilis\u00e9e car plus proche de la naturelle et sans effets secondaires ; des ovules vaginaux, gels, cr\u00e8mes vaginales sont disponibles). On le prend le soir avant d&rsquo;aller se coucher, car la progest\u00e9rone peut induire de la fatigue et du sommeil.<\/p>\n<p>En ce qui concerne le calendrier, la suppl\u00e9mentation en progest\u00e9rone doit commencer le jour du transfert d&#8217;embryons et se poursuivre pendant au moins deux semaines (jusqu&rsquo;aux \u00e9ventuelles menstruations). En cas de r\u00e9sultat positif au test de grossesse, la suppl\u00e9mentation en progest\u00e9rone doit \u00eatre maintenue, mais il n&rsquo;y a pas de consensus sur la dur\u00e9e : selon certains, elle doit durer trente jours apr\u00e8s le transfert d&#8217;embryons ; selon d&rsquo;autres, jusqu&rsquo;\u00e0 la visualisation de l&rsquo;activit\u00e9 cardiaque du f\u0153tus ; selon d&rsquo;autres encore, jusqu&rsquo;\u00e0 la douzi\u00e8me semaine de grossesse.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Dans l&rsquo;ensemble, comme on peut le constater, le corps jaune est un \u00e9l\u00e9ment fondamental et indispensable pour g\u00e9rer l&rsquo;\u00e9quilibre hormonal d\u00e9licat de la femme, qu&rsquo;il s&rsquo;agisse d&rsquo;un cycle menstruel normal ou d&rsquo;une grossesse. Son importance est si cruciale qu&rsquo;elle doit \u00eatre prise en compte lorsqu&rsquo;on envisage une approche de procr\u00e9ation m\u00e9dicalement assist\u00e9e.<\/p>\n<p>D&rsquo;une part, avec sa dur\u00e9e limit\u00e9e dans les cycles non fertiles, il maintient l&rsquo;activit\u00e9 menstruelle et, d&rsquo;autre part, avec sa persistance accrue<\/p>\n<p>pendant la phase de grossesse, il induit la production d&rsquo;hormones qui permettent le d\u00e9but et le maintien de la grossesse elle-m\u00eame.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Corps jaune et ovulation Une fois l&rsquo;ovulation pass\u00e9e, le follicule se transforme en corps jaune. La formation du corps jaune d\u00e9pend en effet du subtil \u00e9quilibre hormonal qui se cr\u00e9e : le pic pr\u00e9ovulatoire de LH joue un r\u00f4le central. Une fois la rupture du follicule et l&rsquo;expulsion de l&rsquo;ovocyte, le corps jaune se forme [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":64411,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121],"tags":[],"class_list":["post-64410","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-grossesse"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Corps jaune et grossesse - Fertilab Barcelona<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fertilab.com\/fr\/corps-jaune-et-grossesse\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Corps jaune et grossesse - Fertilab Barcelona\" \/>\n<meta property=\"og:description\" content=\"Corps jaune et ovulation Une fois l&rsquo;ovulation pass\u00e9e, le follicule se transforme en corps jaune. La formation du corps jaune d\u00e9pend en effet du subtil \u00e9quilibre hormonal qui se cr\u00e9e : le pic pr\u00e9ovulatoire de LH joue un r\u00f4le central. 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La formation du corps jaune d\u00e9pend en effet du subtil \u00e9quilibre hormonal qui se cr\u00e9e : le pic pr\u00e9ovulatoire de LH joue un r\u00f4le central. 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