Effect of the short-term progestagen treatments plus PMSG prior ram introduction on the estrus synchronization and the fertility of Ile de France ewes

Metodiev, N.; Raicheva, E.

doi:10.2298/bah1103157m

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…All ewes had normal previous lambing (lambed during October 2013) and lambs were weaned at mid-January 2014. In previous works of ours (Metodiev et al, 2010;Metodiev & Raicheva, 2011) and also our field experience since 2005 with Ile de France ewes from the flock of IAS-Kostinbrod, we successfully fertilised them without hormonal stimulation by that time of the year (spring, April-May). So the experiment was designed to start in the beginning of the breeding season.…”

Section: Methodsmentioning

confidence: 92%

The effect of saltfree - salt diet on the reproductive performance of Ile de France ewes

Metodiev¹,

Dimov²,

Ralchev³

et al. 2019

BJVM

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The aim of the present study was to establish the effect of salt-free - salt diet (SFSD) on the size of antral follicles during salt consumption, the duration of controlled breeding campaign and the fertilities of ewes from the Ile de France breed. Тhe experiment was carried out with 57 ewes, which were divided into 3 groups (19 ewes in each) depending on whether they were subjected to SFSD and their contacts with rams during the first 8 days of the beginning of breeding: Group I – SFSD + ram contact; Group II – only SFSD; Group III – no SFSD, only ram contacts. The first day of the salt diet coincided with the first day of ram contacts. Transrectal ultrasound examinations of the ovaries were done on days 1, 2, 3, 5, 6 and 7. The time of manifestation of estrus (in days), pregnancy rate and fecundity were studied. A significant effect of time (P<0.05) and diet (P<0.01) on the size of follicles was established. The onset of the first estrus, the shortest terms of breeding campaign, the fertility and the fecundity results gave us reason to favour the scheme applied to Group II. A stimulatory effect of the diet in that study was demonstrated, but the pattern was different from our previous studies.

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Section: Methodsmentioning

confidence: 92%

The effect of saltfree - salt diet on the reproductive performance of Ile de France ewes

Metodiev¹,

Dimov²,

Ralchev³

et al. 2019

BJVM

Self Cite

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Evaluation of Reproductive Performance of Afshari Ewes with a Short Estrus Synchronization Program in Non Breeding Season

hejazi

Masoumi

Shahmoradi

et al. 2018

rap

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Estrus synchronization is a valuable management tool that has been employed in enhancing reproductive efficiency in ewes. This study was conducted to investigate the reproductive performance of ewes with short and long-term estrous synchronization programs accompanied by eCG or GnRH during the non-breeding season. A total of 48 Afshari ewes were randomly selected and divided into two groups. In the first group, ewes received intravaginal sponges for 7 days (n=24) and in the second group ewes received intravaginal sponges for 14 days (n=24). At the time of sponge removal, each group was divided into two subgroups of 12 ewes; intramuscularly received 500 IU eCG and 100 IU GnRH, respectively. Blood samples were collected at the time of sponge removal. Considering plasma progesterone concentrations, there were no significant differences between 7 and 14 days groups (P>0.05). In 14 days group, estrus and lambing rates of eCG subgroup were significantly higher than those in GnRH subgroup (P <0.05). Conception and lambing rates of eCG subgroup in 7 days group were significantly higher than those in GnRH subgroup in 14 days group (P<0.05). In 7 days group, twinning rate of eCG subgroup was significantly higher than that of GnRH subgroup (P<0.05). Therefore, in this study, short-term estrus synchronization programs (7 days) and injection of 500 IU eCG simultaneous with sponge removal exhibited the best reproductive performance in Afshari ewes during non-breeding season.

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Effect of the short-term progestagen treatments plus PMSG prior ram introduction on the estrus synchronization and the fertility of Ile de France ewes

Cited by 2 publications

References 20 publications

The effect of saltfree - salt diet on the reproductive performance of Ile de France ewes

The effect of saltfree - salt diet on the reproductive performance of Ile de France ewes

Evaluation of Reproductive Performance of Afshari Ewes with a Short Estrus Synchronization Program in Non Breeding Season

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