Assertion: estrus | /r/HasProperty | induced in anestrous ewes
Facets:
value: by the introduction of rams
type: CAUSE
Source sentences:
text: Estrus and ovulation can be induced in anestrous ewes by the introduction of rams (ram effect) or by treatment with exogenous progestagen or equine chorionic gonadotropin (eCG), or through the effects of melatonin either by manipulating the photoperiod in housed sheep or through the use of exogenous melatonin in the feed or as an implant.