Effect of barium selenate injections on fertility of Pirlak ewes subjected to estrus synchronization during non-breeding season

Abstract

Kuru M., Sogukpinar O., Makav M., Cetin N.Effect of barium selenate injections on fertility of Pirlak ewes subjected to estrus synchronization during non-breeding season Summary This study was aimed at determining the effect of barium selenate injections on the fertility of Pirlak ewes which had been subjected to progesterone-assisted estrus synchronization during the non-breeding season. A total of 150 Pirlak ewes between the ages of 2 and 5 years were used in the study. Sponges containing progesterone were inserted into the vaginas of the ewes for 11 (groups I and III) or 14 days (groups II and IV) for the purpose of estrus synchronization, and 500 IU equine chorionic gonadotropin (eCG) was administered on the day of sponge removal. In addition, barium selenate was injected s.c. immediately before estrus synchronization protocol in groups I and III. After the sponges had been removed, estrus was observed for four days. The ewes were mated with fertile rams. The pregnancy was determined by transrectal ultrasonography 30 days after mating. It was observed that the estrus rate, pregnancy rate, conception rate, lambing rate, twinning rate, and litter size were not statistically different (P > 0.05) between the groups, but estrus onset was different (P < 0.001). In conclusion, barium selenate injections did not affect the fertility parameters before progesterone-assisted synchronization was applied to the Pirlak ewes during the non-breeding season.

Oestrus synchronisation with progesterone-containing sponge and equine chorionic gonadotropin in Pirlak ewes during the non-breeding season: can Toryum improve fertility parameters?

“…The oestrus and pregnancy rates were similar among the groups, while oestrus onset came in a shorter time in 14-d progesterone treatment ewes (21). In our previous study in Pirlak ewes, oestrus started later in the 11-d progesterone group than in the 14-d group (16). In this study, the oestrus onset was 30.1-37.3 h later and was consistent with the results of many studies.…”

“…Fertility parameters. Fertility parameters such as rates of oestrus onset, oestrus, pregnancy, conception, lambing, twin and triplet births, litter size, and survival in sheep were determined according to the formulae reported by Kuru et al (16). Lambs were monitored for 30 days after birth and deaths among them during this period were recorded against the ewes which were their mothers, and the survival rate was determined.…”

Clinical Use of Progesterone and Its Relation to Oxidative Stress in Ruminants

“…In addition, the dominant follicular LH receptors are sensitive and thus ovulation occurs. As a general principle, these effects of progesterone can be used in estrus synchronization protocols [46][47][48]. Medroxyprogesterone acetate (MAP), fluorogestone acetate (intravaginal sponge), melengestrol acetate, levonorgestrel, and intravaginal progesterone-releasing devices (CIDR and DICO) are used for estrus synchronization in sheep and goats [48][49][50][51][52][53][54][55].…”

“…In the study, the fertility parameters did not change for 11 or 14 day vaginal sponge application. Progesterone administration at different day lengths may be effective for the onset of estrus [48].…”

Controlled Internal Drug Release Uygulaması İle Senkronizasyon Yapılarak Gebe ve Gebe Kalmayan Abaza Keçilerinde Oksidatif/Nitrozatif Stres, Leptin ve Progesteron Konsantrasyonlarının Karşılaştırılması

“…Vaginal inserts that contain progesterone (P4) [sponge or controlled internal drug release (CIDR)] can be used for estrus synchronization in ruminants [1][2][3][4] . These inserts are left in the vagina and can cause tissue damage and inflammation [5] .…”