The daily changes in body temperature and hormones in pregnant cows aren’t controlled by just one clock — they’re shaped by at least two different timing systems working together.
Scientific Claim
The daily rhythm patterns of body temperature and hormones in late-pregnant dairy cows are better described by a two-component model than a single-component model, suggesting complex, multi-oscillator regulation of circadian physiology.
Original Statement
“A 2-component versus single-component cosinor model better described [>coefficient of determination (R2); <Akaike information criterion and <Bayesian information criterion] daily oscillations of all hormones and temperature for both treatments”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design cannot support claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The claim is a direct restatement of statistical model comparison results from the abstract. No causal or mechanistic claims are made, and the verb strength is appropriately conservative.
Evidence from Studies
Supporting (1)
Scientists found that the body temperature and hormone patterns in pregnant cows at the end of pregnancy are too complex to be explained by just one daily rhythm — they need two separate rhythms to make sense, which means their bodies are using multiple internal clocks working together.