{"id":5769,"date":"2020-07-14T14:41:21","date_gmt":"2020-07-14T14:41:21","guid":{"rendered":"https:\/\/magapor.com\/?p=5769"},"modified":"2020-12-14T16:18:07","modified_gmt":"2020-12-14T16:18:07","slug":"seasonal-infertility-in-sows-heat-stress","status":"publish","type":"post","link":"https:\/\/magapor.com\/zh-hans\/technical-news\/seasonal-infertility-in-sows-heat-stress\/","title":{"rendered":"Seasonal Infertility in sows: Heat stress"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 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\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-one-full fusion-column-first fusion-column-last\" style=\"--awb-bg-size:cover;--awb-margin-bottom:0px;\"><div class=\"fusion-column-wrapper fusion-flex-column-wrapper-legacy\"><div class=\"fusion-text fusion-text-1\"><h2>What are the consequences of heat stress in sows?<\/h2>\n<p>The domestic sow has non-seasonal reproductive cycles every 18-24 days (polyestrous) that are only interrupted by other physiological processes such as pregnancy and lactation, or due to other endocrine disorders. However, we can observe a tendency in breeding sows to show more irregular cycles during the summer months. It is called &#8220;seasonal infertility syndrome&#8221;, and it is caused by the effect of:<\/p>\n<ul>\n<li>high temperatures<\/li>\n<li>reduction of the photoperiod<\/li>\n<li>physiological basis inherited from the boar<\/li>\n<\/ul>\n<p>Due to this syndrome, we can observe a negative change on certain reproductive parameters, which are linked to:<\/p>\n<ul>\n<li>lower feed intake<\/li>\n<li>decrease in hormone production, due to the lower ovarian activity<\/li>\n<\/ul>\n<p>These effects in reproduction can be:<\/p>\n<ul>\n<li>Delayed puberty of gilts<\/li>\n<li>Increase in the weaning-oestrus interval, so increase in the percentage of females in anoestrus<\/li>\n<li>Decreased fertility and abortions<\/li>\n<li>Increased acyclic repetitions due to embryonic losses<\/li>\n<li>Decrease in prolificacy<\/li>\n<\/ul>\n<p>Hence, the preventive measures we can take to lessen the impact of this reproductive seasonality are the following:<\/p>\n<ul>\n<li>Photoperiod control throughout the year<\/li>\n<li>Efficient ventilation and cooling<\/li>\n<li>Optimized feed intake<\/li>\n<li>Use of drinking water as a heat conductor<\/li>\n<li>Treatment with exogenous hormones<\/li>\n<\/ul>\n<p>BIBLIOGRAPHY;<\/p>\n<p>Quiles, A., Hevia, M. 2007. <em>Infertilidad estacional en la cerda<\/em>. Producci\u00f3n animal., 233: 4-14.<\/p>\n<p>Falceto, M.V.(2006 a). <em>Prevenci\u00f3n y tratamiento del anestro en la cerda: Anaporc<\/em>. Volumen 3, N\u00ba 27, Pp: 32-40.<\/p>\n<p>Rodr\u00edguez-Est\u00e9vez,V.;S\u00e1nchezRodr\u00edguez, M.;D\u00edaz Gaona,C.(2010). <em>La infertilidad estacional porcina.El anestro y la infertilidad estacional de la cerda<\/em>. Editorial Servet-Grupo Asis<\/p>\n<p><a href=\"https:\/\/www.pig333.com\/articles\/seasonal-infertility-in-swine_1322\/\" target=\"_blank\" rel=\"nofollow noopener noreferrer\"><span style=\"color: #ff6600;\">https:\/\/www.pig333.com\/articles\/seasonal-infertility-in-swine_1322\/<\/span><\/a><\/p>\n<p>We hope this information may be useful for you.<\/p>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n<\/div><div class=\"fusion-clearfix\"><\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":5762,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[94],"tags":[],"class_list":["post-5769","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-news"],"_links":{"self":[{"href":"https:\/\/magapor.com\/zh-hans\/wp-json\/wp\/v2\/posts\/5769","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/magapor.com\/zh-hans\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/magapor.com\/zh-hans\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/magapor.com\/zh-hans\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/magapor.com\/zh-hans\/wp-json\/wp\/v2\/comments?post=5769"}],"version-history":[{"count":4,"href":"https:\/\/magapor.com\/zh-hans\/wp-json\/wp\/v2\/posts\/5769\/revisions"}],"predecessor-version":[{"id":7818,"href":"https:\/\/magapor.com\/zh-hans\/wp-json\/wp\/v2\/posts\/5769\/revisions\/7818"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/magapor.com\/zh-hans\/wp-json\/wp\/v2\/media\/5762"}],"wp:attachment":[{"href":"https:\/\/magapor.com\/zh-hans\/wp-json\/wp\/v2\/media?parent=5769"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/magapor.com\/zh-hans\/wp-json\/wp\/v2\/categories?post=5769"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/magapor.com\/zh-hans\/wp-json\/wp\/v2\/tags?post=5769"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}