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DEPRESSED INCIDENCE OF OESTRUS IN EWES WITH CLOVER DISEASE AT THE BEGINNING OF THE BREEDING SEASON
Author(s) -
Adams N.R.
Publication year - 1979
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.1979.tb00373.x
Subject(s) - estrous cycle , pasture , incidence (geometry) , seasonal breeder , biology , grazing , infertility , zoology , agronomy , endocrinology , pregnancy , ecology , genetics , physics , optics
SUMMARY The incidence of oestrus was depressed in ewes with permanent clover infertility running on non‐oestrogenic pasture, particularly in the first part of the breeding season. The depression was due to the failure of some ewes to display oestrus, and to a more erratic pattern of oestrous activity in the other ewes. The incidence of oestrus was restored to normal by treatment with progesterone. In contrast, the incidence of oestrus was reduced in affected ewes grazing on oestrogenic pasture.