Characterization of Oestrous Induction Response, Oestrous Duration, Fecundity and Fertility in Awassi Ewes During the Non-breeding Season Utilizing both CIDR and Intravaginal Sponge Treatments

Contents The aim of this study was to investigate characterization of oestrous response, onset of induced oestrus, oestrous duration, fecundity and fertility in Awassi ewes treatment with intravaginal sponges and Controlled Intravaginal Drug Release (CIDR) devices in combination with pregnant mare s...

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Bibliographic Details
Published in:Reproduction in domestic animals 2010-06, Vol.45 (3), p.464-467
Main Authors: Ozyurtlu, N, Kucukaslan, I, Cetin, Y
Format: Article
Language:English
Subjects:
Administration, Intravaginal
Animals
Biological and medical sciences
Breeding
Estrus - drug effects
Estrus - physiology
Female
Fertility - physiology
Flurogestone Acetate - administration & dosage
Fundamental and applied biological sciences. Psychology
Gonadotropins, Equine - administration & dosage
Mammalian reproduction. General aspects
Pregnancy
Seasons
Sheep - physiology
Time Factors
Vertebrates: reproduction
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Summary:Contents The aim of this study was to investigate characterization of oestrous response, onset of induced oestrus, oestrous duration, fecundity and fertility in Awassi ewes treatment with intravaginal sponges and Controlled Intravaginal Drug Release (CIDR) devices in combination with pregnant mare serum gonadotropin (PMSG) under local environmental conditions during the non‐breeding season. A total of 62 ewes were divided into three groups. Group CIDR (n = 20) was treated with CIDR devices for 12 days and 400 IU PMSG was injected upon removal of the CIDR. For ewes in Group Sponge (SP) (n = 24), 30 mg fluorogestone acetate was administered to the sheep for 12 days and 400 IU PMSG was injected upon withdrawal of the sponge. Group Control (CON) (n = 18) served as a control group and received no treatment. Adult, intact and sexually experienced Awassi rams were introduced to all groups at the time when the intravaginal devices were removed. There were no significant differences in terms of oestrous response (CIDR: 90%, SP: 87.5%), time to onset of oestrus and duration of induced oestrus between the CIDR and SP groups. The oestrous response of treatment groups was significantly greater (p 
ISSN:0936-6768
1439-0531
DOI:10.1111/j.1439-0531.2008.01246.x