{"id":2104,"date":"2023-10-09T11:24:35","date_gmt":"2023-10-09T09:24:35","guid":{"rendered":"https:\/\/www.rumexperts.vet\/?post_type=training&#038;p=2104"},"modified":"2024-03-16T09:39:22","modified_gmt":"2024-03-16T08:39:22","slug":"comment-interrompre-une-gestation-en-cas-de-gemellite","status":"publish","type":"training","link":"https:\/\/www.rumexperts.vet\/en\/training\/comment-interrompre-une-gestation-en-cas-de-gemellite","title":{"rendered":"COMMENT INTERROMPRE UNE GESTATION EN CAS DE GEMELLITE ?"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1248px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><p>REFERENCE : Lopez-Gatius F. Luteolytic Response to Prostaglandin F2\u03b1 in Lactating Dairy Cows Carrying Dead Twins During the Late Embryo\/Early Fetal Period. Animals 2021, 11, 2508. <a href=\"https:\/\/doi.org\/10.3390\/ani11092508\">https:\/\/doi.org\/10.3390\/ani11092508<\/a><\/p>\n<p>CONTEXTE<\/p>\n<p>Compte tenu de l\u2019augmentation de sa fr\u00e9quence avec le niveau de production laiti\u00e8re, il est recommand\u00e9 d\u2019accompagner le constat \u00e9chographique de gestation de celui de la g\u00e9mellit\u00e9 et le cas \u00e9ch\u00e9ant de la presence d\u2019un ou de deux embryos\/foetus morts. Dans le premier cas, on pratiquera une injection de GnRH pour favoriser le maintien de la gestation, dans le second cas on injectera une PGF2a pour induire un nouvel oestrus aussi rapidement que possible. Bien qu\u2019en th\u00e9orie, la PGF2a soit capable d\u2019interrompre une gestation entre les jours 5 et 165, se pose en termes d\u2019efficacit\u00e9 la question du nombre d\u2019injections \u00e0 r\u00e9aliser et de la dose \u00e0 injecter en fonction du stade de gestation pour obtenir un effet optimal.<\/p>\n<p>MATERIEL ET METHODES<\/p>\n<p>Leur \u00e9tude concerne 615 vaches laiti\u00e8res (production laiti\u00e8re moyenne annuelle de 11.965 kg) qui pr\u00e9sentaient une double mortalit\u00e9 embryonnaire (ME) ou foetale (MF) diagnostiqu\u00e9e respectivement 28 \u00e0 34 jours et 49 \u00e0 55 jours apr\u00e8s l\u2019ins\u00e9mination. Elles furent trait\u00e9es par une dose de 25 mg ou de 37.5 mg de dinoprost.<\/p>\n<p>LEURS OBSERVATIONS<\/p>\n<p>De leurs observations et analyses, il r\u00e9sulte que<\/p>\n<ul>\n<li>L\u2019injection d\u2019une PGF2a induit l\u2019expulsion du contenu ut\u00e9rin bien plus souvent lors de mortalit\u00e9 embryonnaire (88 %) que de mortalit\u00e9 f\u0153tale (34,6 %).<\/li>\n<li>Cette injection s\u2019accompagne d\u2019un \u0153strus dans respectivement 76 (ME) et 28 % (MF) des cas, respectivement 2,8 et 5,6 jours apr\u00e8s l\u2019injection. Le % de gestation des animaux ins\u00e9min\u00e9s apr\u00e8s une mortalit\u00e9 embryonnaire a \u00e9t\u00e9 de 43 %.<\/li>\n<li>L\u2019effet abortif lors de mortalit\u00e9 embryonnaire est moindre chez les vaches dont la production laiti\u00e8re est sup\u00e9rieure \u00e0 45 kg (74 % vs 92 %). On peut y voir une sensibilit\u00e9 moindre des corps jaunes li\u00e9 \u00e0 un catabolisme plus important de la progest\u00e9rone.<\/li>\n<li>Un effet abortif est significativement plus souvent observ\u00e9 en cas de mortalit\u00e9 f\u0153tale avec 37.5 mg de PGF2a (48,1 %) qu\u2019avec 25 mg (28 %). Cet effet dose n\u2019a pas \u00e9t\u00e9 observ\u00e9 lors de mortalit\u00e9 embryonnaire.<\/li>\n<li>Lors de mortalit\u00e9 f\u0153tale, l\u2019injection d\u2019une PGF2a semble moins efficace m\u00eame si la dose est augment\u00e9e et le d\u00e9lai d\u2019obtention du r\u00e9sultat est allong\u00e9. Explication\u00a0: Lors de mortalit\u00e9 embryonnaire ou f\u0153tale en cas de gestation simple, on observe bien plus fr\u00e9quemmment une expulsion du contenu que sa r\u00e9sorption. En cas de g\u00e9mellit\u00e9 et de mortalit\u00e9 d\u2019un seul embryon\/foetus, on n\u2019observe pas d\u2019expulsion s\u00e9lective de l\u2019embryon\/f\u0153tus mort. Il se pourrait que le \u00ab\u00a0survivant\u00a0\u00bb prot\u00e8ge le mort par et notamment la formation d\u2019anastomoses placentaires d\u00e9crites dans 90 % des cas de gestation g\u00e9mellaire. En cas de mort des deux f\u0153tus, la persistance du placenta et de ses facteurs lut\u00e9otropiques seraient responsables d\u2019un effet moindre de la PGF2a.<\/li>\n<\/ul>\n<\/div><div class=\"fusion-image-element \" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><img decoding=\"async\" width=\"800\" height=\"415\" title=\"Lopez Gatius 2021 PGF and ME MF\" src=\"https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/10\/Lopez-Gatius-2021-PGF-and-ME-MF.png\" data-orig-src=\"https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/10\/Lopez-Gatius-2021-PGF-and-ME-MF-800x415.png\" alt class=\"lazyload img-responsive wp-image-2106\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%272617%27%20height%3D%271357%27%20viewBox%3D%270%200%202617%201357%27%3E%3Crect%20width%3D%272617%27%20height%3D%271357%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/10\/Lopez-Gatius-2021-PGF-and-ME-MF-200x104.png 200w, https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/10\/Lopez-Gatius-2021-PGF-and-ME-MF-400x207.png 400w, https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/10\/Lopez-Gatius-2021-PGF-and-ME-MF-600x311.png 600w, https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/10\/Lopez-Gatius-2021-PGF-and-ME-MF-800x415.png 800w, https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/10\/Lopez-Gatius-2021-PGF-and-ME-MF-1200x622.png 1200w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 640px) 100vw, 1200px\" \/><\/span><\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":20,"featured_media":2105,"template":"","keyword":[],"theme":[59],"class_list":["post-2104","training","type-training","status-publish","has-post-thumbnail","hentry","theme-reproduction-en"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.rumexperts.vet\/en\/wp-json\/wp\/v2\/training\/2104","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rumexperts.vet\/en\/wp-json\/wp\/v2\/training"}],"about":[{"href":"https:\/\/www.rumexperts.vet\/en\/wp-json\/wp\/v2\/types\/training"}],"author":[{"embeddable":true,"href":"https:\/\/www.rumexperts.vet\/en\/wp-json\/wp\/v2\/users\/20"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rumexperts.vet\/en\/wp-json\/wp\/v2\/media\/2105"}],"wp:attachment":[{"href":"https:\/\/www.rumexperts.vet\/en\/wp-json\/wp\/v2\/media?parent=2104"}],"wp:term":[{"taxonomy":"keyword","embeddable":true,"href":"https:\/\/www.rumexperts.vet\/en\/wp-json\/wp\/v2\/keyword?post=2104"},{"taxonomy":"theme","embeddable":true,"href":"https:\/\/www.rumexperts.vet\/en\/wp-json\/wp\/v2\/theme?post=2104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}