{"id":2351,"date":"2023-11-29T09:09:07","date_gmt":"2023-11-29T08:09:07","guid":{"rendered":"https:\/\/www.rumexperts.vet\/?post_type=training&#038;p=2351"},"modified":"2024-03-22T19:28:50","modified_gmt":"2024-03-22T18:28:50","slug":"lhcg-a-des-effets-ovulatoires-et-luteotropes-mais-pas-seulement","status":"publish","type":"training","link":"https:\/\/www.rumexperts.vet\/en\/training\/lhcg-a-des-effets-ovulatoires-et-luteotropes-mais-pas-seulement","title":{"rendered":"L\u2019hCG A DES EFFETS OVULATOIRES ET LUTEOTROPES MAIS PAS SEULEMENT"},"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>CONTEXTE<\/p>\n<p>Diverses \u00e9tudes (mais pas toutes) ont d\u00e9montr\u00e9 l\u2019effet favorable sur la fertilit\u00e9 d\u2019une injection d\u2019hCG (1500 \u00e0 2500 UI)\u00a0 4 \u00e0 7 jours apr\u00e8s une ins\u00e9mination ou avant un transfert d\u2019embryon. Cette injection s\u2019accompagne en effet dans 60 \u00e0 100 % des cas de l\u2019ovulation du follicule dominant de la 1<sup>\u00e8re<\/sup> vague et de la formation d\u2019un corps jaune accessoire (CJa). Il en r\u00e9sulte une augmentation de la concentration en progest\u00e9rone, condition favorable au maintien de la gestation. Les auteurs de l\u2019\u00e9tude ont voulu en savoir plus sur les effets d\u2019un tel traitement sur la croissance folliculaire ult\u00e9rieure, la lut\u00e9olyse et dur\u00e9e du cycle en l\u2019ABSENCE DE GESTATION.<\/p>\n<p>Trois groupes (groupe contr\u00f4le non trait\u00e9, groupe trait\u00e9 \u00e0 J7 au moyen de 3300 UI d\u2019hCG et groupe trait\u00e9 aux jours 7 et 13 au moyen de 3300 UI d\u2019hCG) d\u2019une vingtaine de vaches laiti\u00e8res Holstein en lactation ont fait l\u2019objet d\u2019un traitement de synchronisation de type Ovsynch\/CIDR puis d\u2019un suivi progest\u00e9ronique et \u00e9chographique (B-Mode et Echo-Doppler) au cours du mois suivant.<\/p>\n<p>LEURS OBSERVATIONS<\/p>\n<p>L\u2019\u00e9tude confirme les effets ovulatoires (sur le follicule dominant de la 1<sup>\u00e8re<\/sup> vague ou le follicule dominant de la vague suivante) et lut\u00e9otropes (sur le corps jaune principal et et le corps jaune accessoire r\u00e9sultant de l\u2019ovulation) d\u00e9j\u00e0 connus de l\u2019hCG.<\/p>\n<p>Son int\u00e9r\u00eat r\u00e9side dans le fait qu\u2019elle attire notre attention sur le fait que les animaux qui seraient ainsi trait\u00e9s pour augmenter la fertilit\u00e9 en cas d\u2019ins\u00e9mination ou de transfert d\u2019embryons pr\u00e9sentent diverses modifications de leur cycle en cas de non gestation. Ainsi, ce traitement augmente la probabilit\u00e9 d\u2019un cycle avec trois vagues de croissance folliculaire. Il contribue \u00e9galement \u00e0 augmenter l\u2019intervalle entre l\u2019oestrus pr\u00e9c\u00e9dant le traitement \u00e0 l\u2019hCG et le suivant (27,7 \u00e0 27,5 vs 23,8 jours). Il s\u2019accompagne d\u2019une augmentation tr\u00e8s nette de vaches pr\u00e9sentant une lut\u00e9olyse incompl\u00e8te. Il en r\u00e9sulte un allongement cons\u00e9quent de l\u2019intervalle entre ovulations (38,7 \u00e0 38,9 vs 24 jours).<\/p>\n<p>MORALITE<\/p>\n<p>Sur le plan pratique, les observations de cette \u00e9tude renforce l\u2019int\u00e9r\u00eat d\u2019un constat pr\u00e9coce de gestation (&gt; 25-30 jours) et le cas non \u00e9ch\u00e9ant celui de l\u2019examen \u00e9chographique des ovaires pour mettre en place un traitement inducteur des chaleurs en cas de confirmation d\u2019un corps jaune principal et\/ou secondaire.<\/p>\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=\"447\" title=\"Cunha 2022 hCG and oestrus cycle effects\" src=\"https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/11\/Cunha-2022-hCG-and-oestrus-cycle-effects-scaled.jpg\" data-orig-src=\"https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/11\/Cunha-2022-hCG-and-oestrus-cycle-effects-800x447.jpg\" alt class=\"lazyload img-responsive wp-image-2353\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271900%27%20height%3D%271062%27%20viewBox%3D%270%200%201900%201062%27%3E%3Crect%20width%3D%271900%27%20height%3D%271062%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/11\/Cunha-2022-hCG-and-oestrus-cycle-effects-200x112.jpg 200w, https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/11\/Cunha-2022-hCG-and-oestrus-cycle-effects-400x224.jpg 400w, https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/11\/Cunha-2022-hCG-and-oestrus-cycle-effects-600x335.jpg 600w, https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/11\/Cunha-2022-hCG-and-oestrus-cycle-effects-800x447.jpg 800w, https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/11\/Cunha-2022-hCG-and-oestrus-cycle-effects-1200x671.jpg 1200w, https:\/\/www.rumexperts.vet\/wp-content\/uploads\/2023\/11\/Cunha-2022-hCG-and-oestrus-cycle-effects-scaled.jpg 1900w\" 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":2352,"template":"","keyword":[],"theme":[59],"class_list":["post-2351","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\/2351","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\/2352"}],"wp:attachment":[{"href":"https:\/\/www.rumexperts.vet\/en\/wp-json\/wp\/v2\/media?parent=2351"}],"wp:term":[{"taxonomy":"keyword","embeddable":true,"href":"https:\/\/www.rumexperts.vet\/en\/wp-json\/wp\/v2\/keyword?post=2351"},{"taxonomy":"theme","embeddable":true,"href":"https:\/\/www.rumexperts.vet\/en\/wp-json\/wp\/v2\/theme?post=2351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}