Menstruation evolved to protect the uterus from invasive embryos

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.

Menstruation and spontaneous decidualization are understood in evolutionary biology as adaptations that protect the maternal organism from excessively invasive embryos.

The analysis

The retrieved papers include reviews on the evolution of menstruation (e.g., [5], [6]) which explicitly state that menstruation and the associated decidualization evolved to protect the mother from the invasive characteristics of the embryo. Papers [0], [1], [2], [3], and [4] are tangential or on unrelated topics (parasites, molecular evolution, aposematism). Thus, the evidence strongly supports the claim.

Evidence for · 2

The significance and evolution of menstruation.

Recorded source metadata

John Jarrell. The significance and evolution of menstruation.. 2018. https://doi.org/10.1016/j.bpobgyn.2018.01.007

States that spontaneous decidualization and menstruation serve as a mechanism to protect the mother from invasive characteristics of the embryo.

Source citation format

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More for · 1

Why do women menstruate? Historical and evolutionary review.

Recorded source metadata

C A Finn. Why do women menstruate? Historical and evolutionary review.. 1996. https://doi.org/10.1016/s0301-2115(96)02565-1

Explains that menstruation is the shedding of decidualized stroma that evolved in response to highly invasive blastocysts.

Source citation format

The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 7501 Aug 2026

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