{"id":5055,"date":"2025-05-26T13:57:54","date_gmt":"2025-05-26T08:57:54","guid":{"rendered":"https:\/\/vetnewsandviews.com\/en\/?p=5055"},"modified":"2025-05-26T14:37:08","modified_gmt":"2025-05-26T09:37:08","slug":"what-happens-to-dairy-cow-fertility-when-temperatures-rise","status":"publish","type":"post","link":"https:\/\/vetnewsandviews.com\/en\/what-happens-to-dairy-cow-fertility-when-temperatures-rise\/","title":{"rendered":"What Happens to Dairy Cow Fertility When Temperatures Rise?"},"content":{"rendered":"<p><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/vetnewsandviews.com\/en\/wp-content\/uploads\/2025\/05\/create-an-attractive-image-of-this-heading-what-h-1024x576.avif\" alt=\"What Happens to Dairy Cow Fertility When Temperatures Rise?\" srcset=\"https:\/\/vetnewsandviews.com\/en\/wp-content\/uploads\/2025\/05\/create-an-attractive-image-of-this-heading-what-h-1024x576.avif 1024w, https:\/\/vetnewsandviews.com\/en\/wp-content\/uploads\/2025\/05\/create-an-attractive-image-of-this-heading-what-h-300x169.avif 300w, https:\/\/vetnewsandviews.com\/en\/wp-content\/uploads\/2025\/05\/create-an-attractive-image-of-this-heading-what-h-768x432.avif 768w, https:\/\/vetnewsandviews.com\/en\/wp-content\/uploads\/2025\/05\/create-an-attractive-image-of-this-heading-what-h-1536x864.avif 1536w, https:\/\/vetnewsandviews.com\/en\/wp-content\/uploads\/2025\/05\/create-an-attractive-image-of-this-heading-what-h.avif 1820w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-has-transparency=\"false\" data-dominant-color=\"aea984\" style=\"--dominant-color: #aea984\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n<p>What impact does heat stress have on conception rate, interval calving to first insemination, interval first to last insemination and calving interval in dairy cows? Researchers reveal their findings in a recent study.<\/p>\n<p>In this study, published in the Journal of Dairy Science, researchers used temperature-humidity index as an indicator for assessing heat stress conditions for fertility traits in the Holstein dairy cattle breed in the Netherlands.<\/p>\n<figure><img decoding=\"async\" width=\"939\" height=\"744\" src=\"https:\/\/vetnewsandviews.com\/en\/wp-content\/uploads\/2025\/04\/Ads-Chakwal.avif\" alt=\"\" data-has-transparency=\"false\" data-dominant-color=\"dbd9d9\" style=\"--dominant-color: #dbd9d9\" \/><\/figure>\n<h3>Chakwal Pharma <\/h3>\n<p>Bovine Ephemeral Fever Vaccine K-KB<br \/>\nEffective Immunity to cattle against<br \/>\nBovine Ephemeral Fever\n<\/p>\n<p>They indicated that data from artificial insemination and calving events of 416,814 first-parity cows from the Netherlands were used, considering different temperature-humidity index definitions based on different numbers of days before and after artificial insemination events. Using the average temperature-humidity index values of the day of insemination and 1 day before and after the insemination (THI3) allowed the scientists to clearly model the impact on fertility.<\/p>\n<p>\t\t\t\t\t\t\t\t<a href=\"#\"><br \/>\n\t\t\t\t\t\t\t\t\tClick here: Key Factors Driving the Growth of the Milking Robots Market<br \/>\n\t\t\t\t\t<\/a><\/p>\n<p>This study aimed to dive into the impact of heat stress on 4 fertility traits (conception rate, interval calving to first insemination, interval first to last insemination, and calving interval) in Holstein dairy cattle and to determine the temperature-humidity index levels at which heat stress begins to affect these traits.<\/p>\n<p>Firstly, at the population level they identified the temperature-humidity index definition and the temperature-humidity index threshold that most appropriately marked the critical temperature-humidity index levels during which heat stress affects fertility. Then, at an individual level, they investigated the genetic variation of fertility as a function of the experienced temperature-humidity index level.<\/p>\n<figure><img decoding=\"async\" width=\"177\" height=\"285\" src=\"https:\/\/vetnewsandviews.com\/en\/wp-content\/uploads\/2025\/05\/bormed.avif\" alt=\"\" data-has-transparency=\"false\" data-dominant-color=\"9aa2aa\" style=\"--dominant-color: #9aa2aa\" \/><\/figure>\n<h3>MEVAC LSD<\/h3>\n<p>Now you can protect your Herd from lumpy skin disease<br \/>\nThe most widely used vaccine to prevent lumpy skin disease in Asian and African countries\n<\/p>\n<h2>Changes in Fertility Traits<\/h2>\n<p>The study revealed significant changes in fertility traits when dairy cows were exposed to heat stress. They found a clear effect of heat stress on fertility traits, particularly a decrease in conception rate and an increase in interval traits.\u00a0<\/p>\n<p>These effects were more pronounced when the temperature-humidity index threshold marking the onset of heat stress was computed as the average of temperature-humidity index values across a shorter period of time surrounding the day of insemination.<\/p>\n<p>\t\t\t\t\t\t\t\t<a href=\"https:\/\/tinyurl.com\/yrwhg5lq\" target=\"_blank\"><br \/>\n\t\t\t\t\t\t\t\t\tClick here: Strategies to Boost Reproduction and Milk Yield in Transition Cows<br \/>\n\t\t\t\t\t<\/a><\/p>\n<p>The identified temperature-humidity index threshold was 60 for conception rate and interval first to last insemination, and 50 for interval calving to first insemination and calving interval.<\/p>\n<p>The results also highlight the presence of genetic variation in response to heat stress, with genetic effects becoming more pronounced at higher temperature-humidity index levels for all traits studied, which suggests the potential to use this variation to breed heat-resilient animals to improve fertility traits.<\/p>\n<p>The study published in the Journal of Dairy Science was authored by Tijesunimi O. Ojo, Jeremie Vandenplas, Han A. Mulder, Mario P.L. Calus \u2013 Animal Breeding and Genomics, Wageningen University and Research and Mathijs L. van Pelt \u2013 Cooperation CRV.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/vetnewsandviews.com\/en\/wp-content\/uploads\/2025\/04\/Ads-Hi-Tech_page-0001-241x300.avif\" alt=\"Ads Hi-Tech_page-0001\" \/><\/figure>\n<figure><img decoding=\"async\" src=\"https:\/\/vetnewsandviews.com\/en\/wp-content\/uploads\/2025\/04\/486767416_965934092412681_996061242166021491_n-240x300.avif\" alt=\"486767416_965934092412681_996061242166021491_n\" \/><\/figure>\n<p>\t\t\t\t\t\t<svg aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M646 125C629 125 613 133 604 142L308 442C296 454 292 471 292 487 292 504 296 521 308 533L604 854C617 867 629 875 646 875 663 875 679 871 692 858 704 846 713 829 713 812 713 796 708 779 692 767L438 487 692 225C700 217 708 204 708 187 708 171 704 154 692 142 675 129 663 125 646 125Z\"><\/path><\/svg><br \/>\n\t\t\t\t\t\t<svg aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M696 533C708 521 713 504 713 487 713 471 708 454 696 446L400 146C388 133 375 125 354 125 338 125 325 129 313 142 300 154 292 171 292 187 292 204 296 221 308 233L563 492 304 771C292 783 288 800 288 817 288 833 296 850 308 863 321 871 338 875 354 875 371 875 388 867 400 854L696 533Z\"><\/path><\/svg><\/p>\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What impact does heat stress have on conception rate, interval calving to first insemination, interval first to last insemination and calving interval in dairy cows? Researchers reveal their findings in&hellip; <\/p>\n","protected":false},"author":2,"featured_media":5063,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"_EventAllDay":false,"_EventTimezone":"","_EventStartDate":"","_EventEndDate":"","_EventStartDateUTC":"","_EventEndDateUTC":"","_EventShowMap":false,"_EventShowMapLink":false,"_EventURL":"","_EventCost":"","_EventCostDescription":"","_EventCurrencySymbol":"","_EventCurrencyCode":"","_EventCurrencyPosition":"","_EventDateTimeSeparator":"","_EventTimeRangeSeparator":"","_EventOrganizerID":[],"_EventVenueID":[],"_OrganizerEmail":"","_OrganizerPhone":"","_OrganizerWebsite":"","_VenueAddress":"","_VenueCity":"","_VenueCountry":"","_VenueProvince":"","_VenueState":"","_VenueZip":"","_VenuePhone":"","_VenueURL":"","_VenueStateProvince":"","_VenueLat":"","_VenueLng":"","_VenueShowMap":false,"_VenueShowMapLink":false,"footnotes":""},"categories":[19,13],"tags":[2016,2013,2015,2014],"class_list":["post-5055","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-article-blog","category-dairy-and-livestock-insights","tag-cow-reproduction","tag-dairy-cow-fertility","tag-dairy-farm-management","tag-heat-stress-in-cattle"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Happens to Dairy Cow Fertility When Temperatures Rise?<\/title>\n<meta name=\"description\" content=\"Discover how rising temperatures affect dairy cow fertility, including signs of heat stress, reduced conception rates, and management strategies to protect herd productivity.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/vetnewsandviews.com\/en\/what-happens-to-dairy-cow-fertility-when-temperatures-rise\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Happens to Dairy Cow Fertility When Temperatures Rise?\" \/>\n<meta property=\"og:description\" content=\"Discover how rising temperatures affect dairy cow fertility, including signs of heat stress, reduced conception rates, and management strategies to protect herd productivity.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/vetnewsandviews.com\/en\/what-happens-to-dairy-cow-fertility-when-temperatures-rise\/\" \/>\n<meta property=\"og:site_name\" content=\"The Veterinary News &amp; 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