[MCN] The cows might be pregnant when the heat wave settles in

[Lance Olsen]

Effects of Heat Stress on Dairy Reproduction <https://dairy.extension.wisc.edu/articles/effects-of-heat-stress-on-dairy-reproduction/>
 <https://dairy.extension.wisc.edu/articles/effects-of-heat-stress-on-dairy-reproduction/>
University of Wisconsin–Madison <https://dairy.extension.wisc.edu/articles/effects-of-heat-stress-on-dairy-reproduction/>
https://dairy.extension.wisc.edu › articles › effects-of-he... <https://dairy.extension.wisc.edu/articles/effects-of-heat-stress-on-dairy-reproduction/>

Heat stress not only affects the productive ability of your cattle but also their ability to conceive and sustain a pregnancy.


Keeping Cows Pregnant Through the Summer | Ohio BEEF ... <https://u.osu.edu/beef/2017/07/19/keeping-cows-pregnant-through-the-summer/>
 <https://u.osu.edu/beef/2017/07/19/keeping-cows-pregnant-through-the-summer/>
U.OSU <https://u.osu.edu/beef/2017/07/19/keeping-cows-pregnant-through-the-summer/>
https://u.osu.edu › beef › 2017/07/19 › keeping-cows-p... <https://u.osu.edu/beef/2017/07/19/keeping-cows-pregnant-through-the-summer/>

Jul 19, 2017 — However, heat stress can increase pregnancy loss well into the second and even third trimesters. 


Long-lasting effects of in utero heat stress on subsequent ... <https://www.sciencedirect.com/science/article/pii/S0022030224011597>
 <https://www.sciencedirect.com/science/article/pii/S0022030224011597>
ScienceDirect.com <https://www.sciencedirect.com/science/article/pii/S0022030224011597>
https://www.sciencedirect.com › science › article › pii <https://www.sciencedirect.com/science/article/pii/S0022030224011597>

by A Vinet · 2024 — When pregnancy is carried to term, heat stress may have long-term effects on the calf's performance, including postnatal survival and its adult performance up ...

Heat Stress and Reproduction in Beef Cattle <https://extension.usu.edu/animalhealth/research/heat-stress-and-reproduction-in-beef-cattle>
 <https://extension.usu.edu/animalhealth/research/heat-stress-and-reproduction-in-beef-cattle>
USU Extension <https://extension.usu.edu/animalhealth/research/heat-stress-and-reproduction-in-beef-cattle>
https://extension.usu.edu › animalhealth › research › heat... <https://extension.usu.edu/animalhealth/research/heat-stress-and-reproduction-in-beef-cattle>

In short, heat stress lowers libido in bulls which can decrease pregnancy rates of cows (Bhakat et al., 2014)


Reproductive physiology of the heat-stressed dairy cow
National Institutes of Health (NIH) (.gov)
https://pmc.ncbi.nlm.nih.gov › articles › PMC7234026
 <https://pmc.ncbi.nlm.nih.gov/articles/PMC7234026/>
by PJ Hansen · 2019 · Cited by 125 — Heat stress causes a large decline in pregnancy success per insemination during warm times of the year


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“When I tell politicians to act now, the most common answer is that they can’t do anything drastic, because that would be too unpopular among voters. 

“And they are right of course.”

15 yr. old Greta Thunberg in speech to European Parliament

Full text 
https://www.europarl.europa.eu/resources/library/media/20190416RES41665/20190416RES41665.pdf

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