Assertion: estrus's estrus | /r/CapableOf | exhibit various signs of proestrus
Facets:
value: in the natural mating process
type: TEMPORAL
Source sentences:
text: In the natural mating process, the gilt entering estrus may exhibit various signs of proestrus, the period immediately before estrus: redness and swelling of the vulva, off-feed, rooting or mounting penmates, vocalization, etc.