ArticleJournal of animal science2022
Positive relationship of rectal temperature at fixed timed artificial insemination on pregnancy outcomes in beef cattle.
Article in Journal of animal science, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 10 citations in OpenAlex.
- A histidine-mediated supramolecular mechanism links temperature and pH activation of the sperm channel CatSper.PLoS biology · 2026Article
- Increased ruminoreticular temperature after simultaneous lumpy skin disease and foot-and-mouth disease vaccination in Hanwoo (Journal of veterinary science · 2026Article
- A Step Toward Understanding Direct Impacts of a Higher Estrus-Associated Temperature (HEAT): Transcript Level Changes in Cumulus-Oocyte Complexes Directly Exposed to Acute Elevated Temperature.Animals : an open access journal from MDPI · 2025Article
- Impact of Heat Stress on Oocyte Developmental Competence and Pre-Implantation Embryo Viability in Cattle.Animals : an open access journal from MDPI · 2024Review
- The Potential of Infrared Thermography for Early Pregnancy Diagnosis in Nili-Ravi Buffaloes.Animals : an open access journal from MDPI · 2024Article
- Magnitude and persistence of higher estrus-associated temperatures in beef heifers and suckled cows.Journal of animal science · 2024Article
- Heat-induced increases in body temperature in lactating dairy cows: impact on the cumulus and granulosa cell transcriptome of the periovulatory follicle.Journal of animal science · 2022Article
- A Synopsis of the NE1727 Multistate Project Collection in the Journal of Animal Science.Journal of animal science · 2022Article
- NE1727 Multistate Research Project: Influence of Ovary, Uterus, and Embryo on Pregnancy Success in Ruminants.Journal of animal science · 2022Article
- Short Communication: Influence of estrus activity and reproductive tract size and position scores on fertility in Bos indicus and Bos taurus suckled beef cows.Journal of animal science · 2022Article
Corrections and comments
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Authors and funding
10 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The overarching aim was to examine the relationship of rectal temperature at fixed time artificial insemination (FTAI) on pregnancy outcomes in a typical breeding season with expected pregnancy rates approaching 50% using Bos indicus and Bos taurus cattle. This represents a continuum of steps to test the hypothesis that elevated body temperature at or around insemination is functionally important to maximize pregnancy outcomes. Rectal temperature of Bos indicus cattle at FTAI ranged from 37.0 to 40.9 °C; 60.6% were hyperthermic. Positive factors impacting pregnancy outcomes were rectal temperature at FTAI, body condition, and estrus patch scores. Rectal temperature at FTAI was positively associated with pregnancy outcomes (P < 0.0001); per each 1 °C increase pregnancy odds increased 1.9 times (95% CI: 1.4 to 2.6). Highest pregnancy outcomes occurred with rectal temperatures exceeding 40 °C (P = 0.0004). Rectal temperature before FTAI in Bos taurus cattle ranged from 37.8 to 41.8 °C; 43.3% were hyperthermic. Factors impacting pregnancy were rectal temperature at FTAI, estrus activity, parity, and ambient conditions on day of FTAI. Rectal temperature of Bos taurus cattle at FTAI was positively associated with pregnancy (P = 0.0286); odds increased 1.45 times (95% CI: 1.0 to 2.0) per each 1 °C increase. Highest pregnancy outcomes occurred with rectal temperatures at FTAI exceeding 40 °C (P = 0.057). Moreover, positive relationship of rectal temperature at FTAI to pregnancy persisted in estrual females (71.25% of total; P = 0.0408; OR 1.5; 95% CI: 1.0 to 2.2). Mindful that 1) elevated temperatures observed in Bos indicus and Bos taurus cattle directly promote meiotic resumption of the oocyte in vitro and that 2) in vivo hyperthermia alters intrafollicular components which others have shown to potentiate ovulation and promote meiotic resumption, it is biologically plausible that an acute elevation in body temperature at or around time of insemination is functionally important to maximize pregnancy outcomes.
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