Threshold dose of estradiol for inducing sexual receptivity in ovariectomized French-Alpine goats

The minimum dose required, i.e., threshold dose, of estradiol (E 2) for inducing receptivity in ovariectomized goats was determined. Ovariectomized French-Alpine goats were treated with doses of E 2 ranging from 20 to 40 μg during exposure to either ambient breeding season conditions or to constant...

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Bibliographic Details
Published in:Applied animal behaviour science 1998-04, Vol.57 (1), p.109-115
Main Authors: Billings, H.J., Katz, L.S.
Format: Article
Language:English
Subjects:
CAPRIN
CAPRINOS
CICLO ESTRAL
COMPORTAMIENTO SEXUAL
COMPORTEMENT SEXUEL
CYCLE OESTRAL
ENDOCRINOLOGIA
ENDOCRINOLOGIE
ENDOCRINOLOGY
ESTROGENOS
GOATS
OESTROGENE
OESTROGENS
OESTROUS CYCLE
OVARIECTOMIA
OVARIECTOMIE
OVARIECTOMY
Reproduction
Sexual behavior
SEXUAL BEHAVIOUR
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Summary:The minimum dose required, i.e., threshold dose, of estradiol (E 2) for inducing receptivity in ovariectomized goats was determined. Ovariectomized French-Alpine goats were treated with doses of E 2 ranging from 20 to 40 μg during exposure to either ambient breeding season conditions or to constant 8L:16D artificial photoperiod conditions. Beginning 17 h following injection of E 2, behavioral observations were conducted in the presence of sexually-experienced male goats. Five out of 6 goats housed in 8L:16D and 6 out of 7 housed in ambient conditions displayed receptivity after receiving 30 μg of E 2. The number of goats displaying receptivity following treatment with 20 μg of E 2 was not significantly different than those receiving vehicle. Therefore, the minimum effective dose of E 2 for stimulating receptivity under either environmental condition was 30 μg.
ISSN:0168-1591
1872-9045
DOI:10.1016/S0168-1591(97)00131-7