Evidence map›Paper›PMID 42309739›Full record

ReviewThe Journal of reproduction and development2026

Six things to know about how heat stress compromises fertility of the cow (and probably other mammals as well).

Peter J Hansen

Abstract readReview
In one paragraph

Review in The Journal of reproduction and development, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

1 author.

Peter J HansenDepartment of Animal Sciences, Institute of Food and Agricultural Sciences, D.H. Barron Reproductive and Perinatal Biology Research Program, and Genetics Institute, University of Florida, Florida 32611, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Review of the primary literature was used to develop six propositions regarding the nature of actions of heat stress on fertility of the bovine female. The first two propositions are that the reduction in fertility caused by heat stress is due to 1) negative effects on the competence of the oocyte to be fertilized and 2) support embryonic development and death of the embryo when exposed to elevated temperature. The third proposition is that it remains unclear whether damage to the spermatozoa occurs after deposition in the reproductive tract of a heat-stressed female. Fourth, the embryo acquires resistance to heat stress after activation of the embryonic genome. Fifth, heat stress after the first few days of pregnancy usually has only slight effects on embryonic or fetal survival. Sixth, the magnitude of effects of heat stress on fertility is related to the degree of hyperthermia experienced by the female. Thus, physiological and environmental factors that control ability of an animal to regulate its body temperature during heat stress are important determinants of the magnitude of the impact of heat stress on fertility.

Indexed as

FertilityHeat-Shock ResponseHeat Stress DisordersAnimalsCattleEmbryonic DevelopmentFemaleHot TemperatureMaleOocytesPregnancySpermatozoaEmbryoFertilityHeat stressOocyteReproduction

Identifiers

PMID42309739
PMCPMC13286690

What Socratic holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.