نتایج جستجو برای: pregnant ewes
تعداد نتایج: 70088 فیلتر نتایج به سال:
This work was carried out with the objective of studying effect anti-reflux device for ovine insemination (DARIO) on fertility rate in ewes native Portuguese breed Churra Galega Bragançana (CGB) artificially inseminated at fixed-time. Eighty-one aged between one and five years were used. At end April 2021, ewes’ reproductive control out, using a short progestagen treatment (five days) + equine ...
published data on the effects of ruminal bolus on the number of ovulatory follicles in ewes does not exist. the present study determined the effects of a ruminal bolus on trace element status, follicular dynamics and reproductive performance in ewes. eighty afshari cycling ewes were synchronized during breeding season using cidr for 14 days and assigned to 4 groups (n=20); group 1 received a si...
It is well known that the immune response in sheep against Brucella melitensis is subject to individual variation, depending on diverse factors. It bears asking whether these factors (e.g. clinical disease, active infection, state of previous immunity), when affecting a group, can cause variation in the performance of different diagnostic tests. To clarify some of the circumstances in which thi...
The present study was aimed at investigating the effect of experimental infection by Trypanosoma vivax in different stages of pregnancy, determining the pathogenesis of reproductive failure, and confirming transplacental transmission. We used 12 pregnant ewes distributed into four experimental groups: G1, was formed by three ewes infected with T. vivax in the first third of pregnancy (30 days);...
The effects of progestogen-gonadotropin treatment on estrous response, ovulation rate and lambing response of crossbred ewes were examined at two times during the anestrous season (May-June and July-August). Each ewe group was treated with progestogen pessaries for 16 days and injected with 750 IU pregnant mare serum gonadotropin (PMSG) on days 17 and 32 to induce two consecutive estrous period...
The uterine vasculature of women and sheep predominantly expresses type 2 ANG II receptors that do not mediate vasoconstriction. Although systemic ANG II infusions increase uterine vascular resistance (UVR), this could reflect indirect mechanisms. Thus we compared systemic and local intra-arterial ANG II infusions in six near-term pregnant and five ovariectomized nonpregnant ewes to determine h...
The present study was designed to assess the dose-related effects of platelet-activating factor (PAF) on systemic, renal, and uterine hemodynamics in nonpregnant sheep and to evaluate how pregnancy might alter these responses. Nonpregnant and pregnant (110 ± 5 days gestation) ewes were instrumented for conscious measurements of maternal mean arterial pressure (MAP), renal blood flow (RBF), uter...
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