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the claim

Egg-laying animals undergo distinct physiological states comparable to mammalian pregnancy

the verdict
SUPPORTED
the evidence backs this
Recorded sources
2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that egg-laying animals undergo distinct physiological states comparable to mammalian pregnancy?

Yes. Egg-laying animals undergo distinct physiological states during reproduction, such as metabolic and microbiome shifts during gestation, that are comparable to mammalian pregnancy.

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked

The analysis

The retrieved papers include studies showing that oviparous vertebrates like lizards undergo profound physiological changes during gestation, such as gut microbiota restructuring (one study) and hepatic metabolic regulation by hormones (one study) that are directly comparable to mammalian reproductive states. None of the papers refute the claim.

Evidence for · 2
Gestation alters the gut microbiota of an oviparous lizard
2019
The study demonstrates that oviparous lizards undergo distinct physiological and microbiological shifts during gestation that parallel those observed in mammals.
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Trevelline, B. K., MacLeod, K. J., Langkilde, T., & Kohl, K. D. (2019). Gestation alters the gut microbiota of an oviparous lizard. doi.org. https://doi.org/10.1093/femsec/fiz086

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More for · 1
Roles of Estrogens in the Healthy and Diseased Oviparous Vertebrate Liver
2021
This review highlights how oviparous vertebrate livers undergo specific reproductive physiological states, such as producing yolk and eggshell proteins under hormonal control comparable to mammalian reproductive adaptations.
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Tramunt, B., Montagner, A., Tan, N., Gourdy, P., Rémignon, H., & Wahli, W. (2021). Roles of Estrogens in the Healthy and Diseased Oviparous Vertebrate Liver. doi.org. https://doi.org/10.3390/metabo11080502

Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8404 Aug 2026
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