AI Summary

Scientists at LMU published a study in *Nature Communications* showing that cattle embryos can establish and maintain pregnancies without producing interferon tau (IFNT). IFNT, a protein previously thought essential for signaling the embryo’s presence to the mother and preventing pregnancy‑terminating hormonal changes, was found to be dispensable. The research demonstrated that embryos lacking IFNT still led to the birth of healthy calves. This finding challenges the long‑held model of IFNT’s indispensability in bovine pregnancy.

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