Assertion: estrus's estrus | /r/HasProperty | irregular
Facets:
value: in intensity
type: OTHER
value: often
type: DEGREE
Source sentences:
text: First estrus tends to be irregular.
text: Since the transitional period-the phase between winter anestrus and regular cyclic ovarian activity-is gradual and progressive, the first estrus of the breeding season tends to be long and is often also somewhat irregular in intensity.