Search Results
Results 101 - 150 of 847
1 2 3 4 5 6 7 8 9 10 >
Barbato O - - 2009
The aim of the current study was to describe the use of a pool of different antisera raised against pregnancy-associated glycoproteins (PAGs; purified from both ovine and caprine placentas) for early pregnancy diagnosis in ovine species. Sixty-three pluriparous Sarda ewes (Ovis aries) were synchronized. Blood samples were withdrawn on Days ...
Kotsampasi B - - 2009
A study was conducted to evaluate the effects of maternal undernutrition on the hypothalamic-pituitary-gonadal axis in female sheep offspring. Pregnant ewes were fed to 100% throughout pregnancy (Control) or to 50% from 0 to 30 (R1) or from 31 to 100 days of gestation (R2). Female lambs were selected and ...
McNeill Bryony A - - 2009
Circulating concentrations of C-type natriuretic peptide (CNP) and a related amino terminal fragment (NTproCNP) were measured at weekly intervals from preconception to 3 wk postpartum in ewes with twins (n = 8) and nonpregnant ewes (n = 8). In contrast to low and stable values in nonpregnant ewes (CNP, 0.75 ...
Giday Samuel A - - 2009
BACKGROUND: Despite advances in the development of fetal surgery, morbidity and mortality are substantial. A natural orifice transluminal endoscopic surgery (NOTES)-guided approach to the gravid uterus may offer a less-invasive technique. OBJECTIVE: To assess the feasibility of NOTES for diagnostic and therapeutic intrauterine fetal interventions. SETTING: Survival and nonsurvival experiments ...
Lafi S Q - - 2009
A prospective cohort study was conducted using 32 randomly selected Awassi sheep flocks to identify factors hypothesized to be associated with the occurrence of pregnancy, twinning and fetal loss between August 2005 and May 2006 in the region of Al-Safawi (northeast of Jordan). Vitamins A and E and selenium concentrations ...
Lekatz L A - - 2010
To examine the effects of maternal supranutritional selenium (Se) and nutrient restriction during mid and late gestation on placental characteristics and fetal liver glycogen, ewes received either adequate Se (ASe) or high Se (HSe) prior to breeding. On d 64 of gestation, ASe and HSe ewes remained at 100% of ...
Shirazi Abolfazl - - 2009
This is the first report of an acephalous lamb from the transfer of an in vitro-produced sheep embryo. Twelve in vitro-fertilized embryos were transferred to 4 recipient ewes (3 embryos/ewe). Two ewes remained pregnant: one delivered a normal female lamb, the other a male acephalous lamb. Possible contributing factors are ...
Smith N A - - 2009
Investigate the effect of transient hyperglycemic intake (analogous to snacking on high glycaemic foods) in the third trimester of pregnancy on offspring birthweight and subsequent growth in sheep. Randomised trial. University research farm. Third trimester pregnant ewes. Ewes were blocked on weight, age and litter size and were randomly assigned ...
Tekin Ahmet - - 2009
It is known that carbon dioxide (CO2) pneumoperitoneum induces fetal acidosis in pregnant ewes. Our aim was to determine changes of the levels of maternal and fetal cytokines interleukin-6, interleukin-8, and tumor necrosis factor alpha after CO2 pneumoperitoneum in pregnant ewes. Eight ewes with singleton pregnancies of 120 to 140 ...
Ahmed Amer, Hussein; Department ...
The effect of intra-vaginal Fluorogestone-Acetate (FGA) sponges (a progesterone analogue) +/- eCG (equine chorionic gonadotropin) on the fertility of anestrous ewes was assessed. Ninety-six ewes were divided into 4 groups (24/group). The ewes were exposed to treatment for 6 days (FGA or FGA+eCG groups) and for 12 days (FGA or ...
Taylor J B - - 2009
The objective was to describe the effects of dietary Se concentration and source on fetal and maternal Se load when fed to nulliparous ewes during mid- to late pregnancy. Pregnant, nulliparous ewes (n = 32; 45.6 +/- 2.3 kg; 330 +/- 17 d of age) were randomly assigned to treatment ...
Sosa C - - 2009
The effects of pregnancy and undernutrition on endometrial gene expression were investigated in ewes fed all or half their maintenance requirements and killed on Day 14 of pregnancy or of the oestrous cycle. The endometrial expression of progesterone, oestrogen, oxytocin and interferon receptors (PR, ERalpha, OXTR and IFNAR, respectively), cyclo-oxygenase ...
Ozyurtlu N - - 2010
The aim of this study was to investigate characterization of oestrous response, onset of induced oestrus, oestrous duration, fecundity and fertility in Awassi ewes treatment with intravaginal sponges and Controlled Intravaginal Drug Release (CIDR) devices in combination with pregnant mare serum gonadotropin (PMSG) under local environmental conditions during the non-breeding ...
Kenyon Pr - - 2008
AIM: To determine if exposure to ram lambs whose scrotums had been shortened by the use of a rubber ring would induce reproductive activity in ewe lambs, and determine if this technique was an effective alternative to vasectomised mature rams. METHODS: Seven hundred and forty-nine Romney ewe lambs, 7-8 months ...
Yarim Gul Fatma - - 2009
Pregnancy toxemia is a metabolic disease of pregnant ewes which causes significant economic losses in sheep industry. The pathophysiology and metabolic changes of this disorder remain poorly understood. We conducted this study to describe the serum protein pattern associated with the pregnancy toxemia in ewes. In this study, the electrophoretic ...
Colucci Philippe - - 2009
The purpose of this study was to determine the effect of a single dose of 300 mg of ritonavir on the plasma pharmacokinetics (PK) of a single dose of 20 mg of elvucitabine when the two drugs were coadministered in healthy subjects. In a three-way crossover design, 30 subjects received ...
Kuehn L A - - 2009
Connectedness among animals in separate flocks reduces the risk of biased comparisons when selecting across flocks on EBV. The objective in this study was to assess levels of connectedness in the genetic evaluation of weaning weight among Targhee and Suffolk flocks participating in the US National Sheep Improvement Program (NSIP). ...
Pérez R - - 2008
In pregnant sheep at 120-130 days of gestational age, a study was undertaken in order to characterize the pharmacokinetics and transplacental exchange of Ivermectin after maternal or fetal intravenous administration. Eight pregnant Suffolk Down sheep of 73.2 +/- 3.7 kg body weight (bw) were surgically prepared in order to insert ...
Sosa C - - 2009
This study investigated whether a 27-day period of nutrition at half-maintenance during early pregnancy (up to Day 14) could alter maternal endocrine responses. Forty-six ewes were fed all or half of their maintenance requirements and slaughtered on Day 14 of the oestrous cycle or pregnancy. We used real time RT-PCR ...
Elnageeb Mohammed E - - 2008
Twenty sexually mature Desert ewes were used to study the effects of concentrate supplementation on thermoregulation and reproductive traits. The ewes were divided into two equal groups, control and supplemented; the supplemented group received daily 500 g of concentrate mixture (crushed sorghum grain and cotton seed cake). In both groups, ...
Farrow Kathryn N - - 2008
Endothelial nitric oxide (NO) synthase (eNOS) expression and activity are decreased in fetal lambs with persistent pulmonary hypertension (PPHN). We sought to determine the impact of mechanical ventilation with O(2) with or without inhaled NO (iNO) or recombinant human SOD (rhSOD) on eNOS in the ductal ligation model of PPHN. ...
DuBois Steven G - - 2008
Ewing sarcoma is the second most common type of malignant bone tumor in children and young adults. We report 2 patients with a history of Ewing sarcoma who were diagnosed with recurrent tumor during or immediately after pregnancy. To determine whether the hormonal milieu of pregnancy might have contributed to ...
Gao Haijun - - 2009
Nutrients in uterine secretions are essential for development and survival of conceptuses (embryo and associated extraembryonic membranes) during pregnancy; however, little is known about changes in the amounts of specific nutrients in the uterine fluids of cyclic and pregnant ruminants. This study determined quantities of glucose, amino acids, glutathione, calcium, ...
Brunet P - - 2008
The paper reports on the comparison of the wetting properties of superhydrophobic silicon nanowires (NWs), using drop impact impalement and electrowetting (EW) experiments. A correlation between the resistance to impalement on both EW and drop impact is shown. From the results, it is evident that when increasing the length and ...
Vonnahme K A - - 2008
Ovine placentomes vary in shape, with type A placentomes being concave, type D convex, and types B and C intermediate in morphology. It has been speculated that as placentomes advance in type they differ in vascularity and nutrient transport capacity. Our objective was to determine cellularity and vascularity measurements, angiogenic ...
Ali A - - 2008
The aim of the present study was to investigate the effect of breeding season [late spring (LSP) vs winter (WIN)] on reproductive performances, foetal development and progesterone (P(4)) concentrations of sheep in the subtropics. Ewes of Farafra breed were exposed for mating in LSP (n = 79) and WIN (n ...
Waage Steinar - - 2008
An m:n matched case-control study was conducted to identify risk factors for ovine clinical mastitis (CM). Data were from a national sheep registry and only ewes that lambed in the spring of 2004 were included. Eligible cases (n = 2857) and controls (n = 76,716) from 1056 flocks of meat ...
Quigley S P - - 2008
Maternal feed allowance during pregnancy can affect the development of the ovine placenta and fetus. The impact of variations in feed allowance prior to as well as throughout pregnancy has received less attention. Ewes were offered 0.6 (R), 1.2 (C) or 1.8 (AL) maintenance requirements from 89 days before conception ...
Firth E C - - 2008
Bone formation and loss are related to the strain imposed on bone by muscle forces. Bone mineral content (BMC) and lean mass (LM) of fetal lambs was determined at day 140 of pregnancy in 8 groups of ewes, which were of either large or small body size, on either high ...
Munsterhjelm C - - 2008
From 1.1.2013 EU legislation will permit stall-housing of dry sows for only 4 weeks post-service. Stalls are associated with compromised animal welfare, but group housing comes with risks from social confrontations. Studies on housing effects on fertility have produced contradictory results as systems are inconsistently defined. Effects of housing on ...
deNicolo G - - 2009
The objective of this experiment was to measure blood progesterone concentrations during early gestation to determine if the apparent reproductive failure in ewes bred out-of-season is due to a failure to conceive or embryonic loss. Blood samples were collected from spring- (n=61) and autumn-bred ewes (n=29) from Days 8 to ...
Hawken P A R - - 2009
This study compared the affect of short-term and continuous exposure to rams during the transition between anoestrus and the breeding season on the distribution of mating and subsequent lambing. Further, within ewes continuously exposed to rams we investigated the effect of replacing these rams every 17 days with 'novel' rams. ...
Goodwin-Ray K A - - 2008
Subclinical pneumonia is common in production lambs, and causes reductions in growth rate. We selected farms from meat-inspection records of three New Zealand abattoirs from December 2000 to May 2001 to study risk factors for flocks having >or=3% of their lambs with >or=10% of the lung surface with lesions, compared ...
Lilenbaum W - - 2008
Thirteen goat herds and seven sheep flocks in the state of Rio de Janeiro, Brazil were screened for leptospirosis. From the three herds and three flocks with greatest seroreactivity, 19 goats (16 females and three bucks) and 40 sheep (26 ewes and 14 rams) that were seropositive (specific anti-Leptospira titres ...
Dwyer C M - - 2008
Individual variation in the expression of maternal behaviour can affect offspring development and survival. Ewes showing a poorer quality of maternal behaviour (low levels of licking and grooming, infrequent low-pitched bleating, inconsistent udder acceptance) at parturition and throughout lactation (large ewe-lamb distance, low vigilance) form a weaker bond with their ...
Jobgen W S - - 2008
Adequate delivery of AA is essential for normal fetal growth and development. Recently, we reported that when ewes from the University of Wyoming flock (farm flock with adequate nutrition) were fed 50% (nutrient-restricted) or 100% (control-fed) of the NRC-recommended nutrient requirements between d 28 and 78 of gestation, fetal weights ...
Afolayan R A - - 2008
The reproduction of 2,846 crossbreed ewes with 7,899 records is reported. The ewes were progeny of mainly Merino dams and 91 sires from several maternal sire breeds including Border Leicester, East Friesian, Finnsheep, Coopworth, Corriedale, Booroola Leicester, and several others. There were 3 cohorts of ewes at each of 3 ...
Eggink A J - - 2008
BACKGROUND/PURPOSE: The aim of the study was to evaluate whether a collagen biomatrix is useful for delayed intrauterine coverage of a surgically created spina bifida in a fetal lamb. METHODS: In 20 fetal lambs, surgery was performed at 72 or 79 days' gestation. In 15 lambs a spina bifida was ...
Oliveira João F - - 2008
The ruminant conceptus synthesizes and secretes interferon (IFN)-tau, which presumably acts via an intrauterine paracrine mechanism to signal maternal recognition of pregnancy. The aims of this study were to determine whether IFN-stimulated genes (ISG) such as ISG15 and OAS-1 are differentially expressed in blood cells circulating in the uterus of ...
Saldeen Pia - - 2008
OBJECTIVE: To compare the performance of the Cook Sydney IVF (SIVF) embryo transfer (ET) catheter and the Edwards-Wallace (EW) ET catheter. DESIGN: Prospective randomized controlled clinical trial with an intention-to-treat analysis. SETTING: Two-center study. PATIENT(S): Four hundred consecutive women <40 years undergoing ET with two fresh embryos. INTERVENTION(S): Women were ...
Kenyon P R - - 2007
AIM: To determine the effects of the ratio of vasectomised (teaser) rams to ewe hoggets used prior to breeding on the breeding performance and pregnancy rate of ewe hoggets. METHODS: Romney-composite ewe hoggets (n=1,180), 7-8 months of age, were randomly assigned to one of five treatment groups (Day 1) and ...
Moeini M M - - 2007
A trial was conducted to evaluate the effects of FGA (Fluorogestone acetate) and CIDR (Controlled internal drug release) on the induction of estrus and pregnancy and fecundity rates of the Sanjabi and Lori sheep. A total of 360 Sanjabi and Lori sheep were randomly grouped into two treatments with intravaginal ...
Everett-Hincks J M - - 2008
This paper examines the environmental and management factors affecting lamb survival on high-performing sheep farms in New Zealand. Improved lambing percentage is the biggest contributor to higher profits on New Zealand sheep farms. Many sheep breeders have selected and bred ewes for increased fecundity over the last 4 decades. The ...
Gao Feng - - 2007
This study investigated the effects of hormonal status and metabolic changes of restricted ewes during late pregnancy on the ovine fetus growth and development. One hundred Mongolian ewes, synchronized for oestrus and mated, were divided into three groups and offered 0.175 MJME.kgw(-0.75).d(-1) (Restricted Group 1, RG1), 0.33 MJME.kgw(-0.75).d(-1) (Restricted Group ...
Davey Marcus - - 2007
OBJECTIVE: A morphometric study was performed to examine the effects of prenatal glucocorticoids, which were administered 48 hours before birth, on muscularization of small pulmonary arterioles (<60 microm diameter) in lambs with diaphragmatic hernia (DH) after fetal tracheal occlusion (TO). STUDY DESIGN: DH was created in 23 fetal sheep at ...
Dong Feng F Division of Pharmaceutical Sciences, University of Wyoming, Laramie, WY 82071, - - 2008
Intrauterine nutrition status is reported to correlate with risk of cardiovascular diseases in adulthood. Either under- or overnutrition during early to mid gestation contributes to altered fetal growth and ventricular geometry. This study was designed to examine myocardial expression of ciliary neurotrophic factor receptor alpha (CNTFRalpha) and its downstream mediator ...
Wurst A K - - 2007
The objective was to determine if transrectal ultrasonography for determination of pregnancy in restrained ewes increases embryonic/fetal death or loss of pregnancy. Ten flocks (N=873 ewes) bred in either the estrous or anestrous season were randomized, into control (C) or examined (E) groups within flock. Examined ewes were placed in ...
Dwyer C M - - 2008
The relatively intensive supervision afforded many ewes at lambing time is a barrier to the development of low-input sheep management systems. However, in some flocks, reduction in this level of supervision may initially affect lamb mortality and animal welfare. In this review, possibilities for optimizing behavioral interaction between the ewe ...
Weems Y S - - 2007
LH regulates luteal progesterone secretion during the estrous cycle in ewes and cows. However, PGE, not LH, stimulated ovine luteal progesterone secretion in vitro at day 90 of pregnancy and at day 200 in cows. The hypophysis is not obligatory after day 50 nor the ovaries after day 55 to ...
Goodwin-Ray K A - - 2008
We recorded lesions of moderate-to-severe pneumonia (>or=10% lung surface area affected; "pneumonia") in 1,899,556 lambs submitted to three New Zealand abbatoirs between December 2000 and September 2001. The average prevalence of pneumonia ranged between 7 and 13%, by abbatoir. We ran a two-level mixed-effects binomial logistic-regression model with the prevalence ...
1 2 3 4 5 6 7 8 9 10 >