Use of fluorogestone acetate sponges or controlled internal drug release for estrus synchronization in ewes: Effects of hormonal profiles and reproductive performance

Swelum, Ayman A.; Alowaimer, Abdullah N.; Abouheif, M. A.

doi:10.1016/j.theriogenology.2015.03.018

Cited by 48 publications

(35 citation statements)

References 13 publications

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“…The shorter interval to onset of estrus in FGA-treated ewes in this study was probably caused by the differences in the rate of absorption and metabolization of each progestagen. However, this observation disagrees with the finding of Swelum et al (2015) who reported a shorter time to estrus onset in Najdi ewes treated with CIDR or FGA during the breeding season. The mean time to onset of estrus observed in this study was 39 hours.…”

Section: ■ Discussioncontrasting

confidence: 99%

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Effet de l’acide ascorbique sur le taux de fécondation des brebis Yankasa après synchronisation de l’œstrus

Omontese

Adewuyi

Rekwot

et al. 2017

Rev. Elev. Med. Vet. Pays Trop.

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L’objectif de cette étude était d’évaluer les effets d’une administration d’acide ascorbique (AA) sur le taux de fécondation de brebis dont les chaleurs étaient induites par deux traitements à base de progestogènes. Des brebis de race Yankasa (n = 64) ont été réparties de façon égale en deux groupes. Dans l’un, les brebis ont été traitées avec un dispositif intravaginal de libération continue du médicament (CIDR). Dans l’autre, les brebis ont été traitées avec 45 mg d’acétate de fluorogestone (FGA) au moyen d’une éponge vaginale. Après le retrait des progestogènes, les brebis de chaque groupe exprimant des chaleurs ont été réparties en quatre sous-groupes : CIDR témoin (CDNN, n = 12), CIDR plus AA (CDAA, n = 11), FGA témoin (FGNN, n = 13) et FGA plus AA (FGAA, n = 12). La détection des chaleurs a été réalisée au moyen de béliers sexuellement actifs et laissés libres de s’accoupler avec les femelles. Le taux d’expression des chaleurs n’a pas différé entre les sous-groupes. L’intervalle entre le retrait des dispositifs et l’apparition des chaleurs a été significativement (p < 0,05) plus court chez les brebis du groupe FGA que chez celles du groupe CIDR (respectivement 30,35 ± 2,72 et 48,56 ± 7,52 heures). La durée de l’oestrus n’a pas différé (p < 0,05) entre les traitements (FGA 37,22 ± 4,22 et CIDR 39,75 ± 2,51 heures). Les taux de fécondation ont été comparables entre sous-groupes. En conclusion, l’administration d’AA lors du retrait des dispositifs progestogéniques n’a pas amélioré le taux de fécondation des brebis Yankasa.

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Section: ■ Discussioncontrasting

confidence: 99%

“…The mean time to onset of estrus observed in this study was 39 hours. This is similar to reports of other authors in different breeds of sheep following estrus synchronization (Hashemi et al, 2006;Omontese et al, 2014b;Swelum et al, 2015).…”

Section: ■ Discussionsupporting

confidence: 93%

Effet de l’acide ascorbique sur le taux de fécondation des brebis Yankasa après synchronisation de l’œstrus

Omontese

Adewuyi

Rekwot

et al. 2017

Rev. Elev. Med. Vet. Pays Trop.

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“…Short‐term protocols (5–7 days of progesterone insertion) are increasingly used since they are equally as effective as long‐term protocols for inducing ovulation and fully functional corpora lutea (Martinez‐Ros, Astiz, Garcia‐Rosello, Rios‐Abellan, & Gonzalez‐Bulnes, ), with lower incidence of vaginal infections (Martinez‐Ros, Lozano, et al, ) and higher fertility yields (Menchaca, Santos‐Neto, Cuadro, Souza‐Neves, & Crispo, ; Swellum, Alowaimer, & Abouheif, ).…”

Section: Introductionmentioning

confidence: 99%

Onset of oestrus and periovulatory events in sheep exposed to 5 and 14 days of CIDR treatment with and without eCG

Uriol¹,

Martínez-Ros

Rios

et al. 2019

Reprod Domestic Animals

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The present study supports that 5‐day short‐term CIDR treatments without administration of eCG are equally effective for inducing oestrus behaviour, preovulatory LH discharge and ovulation in sheep than classical protocols based on 14‐day treatments plus eCG at CIDR withdrawal. However, the implementation of a 5‐day protocol without eCG for fixed‐time artificial insemination would be adapted to a later timing of ovulation (p < .05).

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“…Controlled internal drug release (CIDR) has proven efficiency in the synchronization of oestrus and in the improvement of reproductive performance in farm animals (Martinez et al, ; Swelum & Alowaimer, ; Swelum, Alowaimer, & Abouheif, ). Because of the suppressive effect of long‐term (12–14 days) progestogen treatment on fertility (Diskin, Austin, & Roche, ; Viñoles, Forsberg, Banchero, & Rubianes, ), an alternative and practical short‐term progestogen treatment for oestrous synchronization has already been suggested for ewes (Ali, ).…”

Section: Introductionmentioning

confidence: 99%

Efficacy of using previously used controlled internal drug release (CIDR) insert on the reproductive performance, hormone profiles and economic measures of sheep

Swelum

Saadeldin

Moumen

et al. 2018

Reprod Domestic Animals

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This study was conducted using 120 multiparous Awassi ewes during the breeding season to compare the effects of using previously used controlled internal drug release (CIDR) on the hormone profiles, reproductive performance and economic measures of ewes. Ewes were randomized to receive one of five previously used CIDR (previously used for 6, 12, 18, 24 or 30 days) or the new CIDR as a control for 6 days (CIDR6, CIDR12, CIDR18, CIDR24, CIDR30, and CIDR0 [control], respectively). Blood samples were collected on four occasions, at the time of CIDR insertion, after 3 days of insertion, and at the time of withdrawal and insemination. Serum estradiol (E2) and progesterone (P4) concentrations were measured. Timed insemination was performed 48 hr post-CIDR withdrawal. Pregnancy was diagnosed by ultrasonography 23 days after insemination and confirmed on day 35. The heat detection rate was significantly (p < 0.05) higher in the CIDR0 and CIDR6 groups than in the CIDR18 and CIDR30 groups. The total pregnancy rate and fecundity were significantly (p < 0.05) higher in the CIDR6 group than in other groups. P4 level was significantly (p < 0.05) higher in the CIDR0 group than in the CIDR30 group at the time of removal. At each time point, the E2 level was significantly (p < 0.05) higher in the CIDR6 group than at the other groups. The total variable cost, total cost, return and net profit were higher in the CIDR6 and CIDR0 groups than in the other groups. In conclusion, although previously used CIDRs are efficient at synchronizing oestrus in ewes, the duration of previously usage significantly affected the reproductive parameters and economic profit. CIDRs previously used for 6 days and new CIDRs provided the highest fertility and fecundity rates, besides return and net profit. Economically, it is not advisable to use CIDRs that previously used for 12 days or more.

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Use of fluorogestone acetate sponges or controlled internal drug release for estrus synchronization in ewes: Effects of hormonal profiles and reproductive performance

Cited by 48 publications

References 13 publications

Effet de l’acide ascorbique sur le taux de fécondation des brebis Yankasa après synchronisation de l’œstrus

Effet de l’acide ascorbique sur le taux de fécondation des brebis Yankasa après synchronisation de l’œstrus

Onset of oestrus and periovulatory events in sheep exposed to 5 and 14 days of CIDR treatment with and without eCG

Efficacy of using previously used controlled internal drug release (CIDR) insert on the reproductive performance, hormone profiles and economic measures of sheep

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