Neospora caninum is an obligate intracellular parasite and is recognised as the leading cause of bovine abortion worldwide. Natural infection with N. caninum has been described in sheep but it has generally not been regarded as a significant cause of abortion. Recently, there have been several New Zealand cases of foetal abortions where N. caninum was detected which strongly suggested the invol...

reproductive abnormalities cause major losses of sheep production. abattoir materials were used todetermine the extent of reproductive wastage. reproductive tracts were collected from 524 ewes slaughtered at urmia slaughter-house in urmia, northwest of iran, during a period of 12 months. overall, 30.10% of the ewes examined were pregnant. a total of 149 (28.44%) tracts developed acquired reprod...

The objective of this study was to determine the effect of supplemented organic selenium at different levels to concentrate feed of Norduz ewes in late pregnancy on maternal serum, placenta, colostrum, and offspring serum concentrations. This study was conducted using two-year-old 35 Norduz ewes. Ewes were randomly assigned to one of three dietary treatments for 57 days prepartum and at the sev...

To study the effects of elevated maternal levels of adrenocorticotropic hormone (ACTH) on the fetus, nine chronically catheterized pregnant ewes (132 ± 0.9 days of gestation) were infused intravenously for 3 days with Synacthen (5 μg ⋅ kg-1 ⋅ day-1). Four ewes were given 0.15 M saline intravenously over the same period. ACTH induced hypertension in the ewe. Mean arterial pressure (MAP) increase...

Twenty-one pregnant ewe lambs (nine superovulated and 12 non-superovulated) were used to study the effects of superovulation (injecting 700 IU PMSG at the end of diestrus) on maternal serum progesterone concentrations, uterine and fetal weights at weeks 7 and 15 of pregnancy. In the ewes sacrificed at week 7 of pregnancy, superovulation increased the mean number of corpora lutea (P<0.01), fetus...

Lambs gain about 70 % of their birth weight in the last 6 weeks pregnancy. In this period, many physiological events occur ewe metabolism. The increase number fetuses also affects these events. aim study was to determine effect single and twin pregnancy on serum cortisol, glucose, triglyceride, HDL-cholesterol, total protein, cholesterol, calcium phosphorus levels at postpartum days. This condu...

p R E L I M I N A R Y work at this laboratory indicated that lambs are born with a low plasma vitamin A level. Similar results have been reported by Pierce (1947) and Pope et al. (1949). In the preliminary study a correlation of 0.39 was found between plasma vitamin A level of lambs at birth and birth weight, of 0.38 between plasma vitamin A level of lambs at 10 days and average daily gain from...

After oral administration of ewes during mid gestation with 2000 freshly prepared sporulated oocysts of T. gondii isolate M4, abortions occurred between days 7 and 11 in 91.6% of pregnant and infected ewes. Afterwards, a further infection was carried out at late gestation in another group of sheep with 500 sporulated oocysts. Abortions happened again between days 9 and 11 post infection (pi) in...

The effect of selenium supplementation in inorganic and organic form was investigated in three five-member groups of ewes and their lambs in the course of 7 months. The basal feed ration contained 55 μg Se, ewes of experimental group E1 received a supplement of 180 μg Se in sodium selenite, and ewes of experimental group E2 were applied a supplement of 180 μg selenium bound in the biomass of th...

A total of 378 ewe lambs were evaluated for signs of pregnancy using five methods of detection. The methods used were breeding mark, rectal-abdominal palpation, an intrarectal Doppler instrument and two ultrasonic devices, the Scanoprobe and Scanopreg (Model 738) for sheep. Accuracies of pregnancy diagnosis based on grease marks at mating vs lambing results were 65.7% in 1976 and 75.5% in 1977 ...