Search Results
Results 401 - 450 of 1417
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Kharche S D - - 2007
The aim of this study was to investigate the effect of treating repeat breeder dairy crossbred cows with different doses of GnRH analogue through i.m. at the time of artificial insemination, on pregnancy rates from their first service after treatment and overall pregnancy rates. One hundred and thirty seven crossbred ...
Yániz J L - - 2006
The postpartum period is critical for efficient reproduction, and certain features of the normal estrus cycle during this period have been associated with subsequent reproductive performance. The objectives of the present investigation were to evaluate the effects of environmental, production, and reproductive factors on walking activity at estrus as determined ...
Szenci Ottó - - 2006
The objective of this study was to evaluate the effects of GnRH administered at Day 12 post-AI on the reproductive performance of dairy cows. Holstein-Friesian dairy cows (n=103) on a large Hungarian dairy farm were allocated randomly to treated (n=54) or control (n=49) groups. Twelve days after AI, treated cows ...
Sood Pankaj - - 2006
Lameness, a common disease in crossbred dairy cows, badly affects their fertility. To elucidate, if estrous behavior, comprising of duration and expression of certain estrous behavioral sign(s) (EBS), is involved, an estrous expression score system was applied to objectively compare estrous behavior during 27 and 58 estrous periods, respectively, in ...
Kanuya N L - - 2006
A prospective longitudinal study was carried out from September 2001 to June 2004 in three adjacent villages in a semi-arid area of Tanzania. The objectives of this study were to measure the intervals between calving and either resumption of cyclical activity or confirmation of pregnancy, to estimate calving intervals, and ...
McDougall S - - 2006
AIM: To describe the effect of treatment of cows not detected in oestrus (NDO) with progesterone (P4) and oestradiol benzoate (ODB) in one lactation, on the reproductive and productive performance in the subsequent lactation. METHODS: Cows (n=770 from nine herds) which were NDO 10 days before the planned start of ...
Vaccino Patrizia - - 2006
Sunn pest (or cereal bug) (Heteroptera: Pentatomidae and Scutelleridae) infestations of wheat, Triticum aestivum L., in the grain filling stage have the potential to adversely affect the quality of harvested grain for bread making. In the absence of resistant wheat cultivars, producers must rely on chemical control to protect their ...
Rius A G - - 2006
Exposure to a long-day photoperiod (LDPP) increases mammary and lean growth in heifers relative to a short day (SDPP). Whether these effects influence milk yield, however, is unknown. To test the hypothesis that pre-pubertal long-day exposure would increase milk production, we assigned prepubertal heifers to LDPP (16 h of light:8 ...
Thitaram Chatchote - - 2006
A 32-year-old nulliparous female Asian elephant (Elephas maximus) showed signs of parturition 8 months later than predicted from the breeding records. However, while serosanguineous fluid, necrotic tissue and pieces of amnion were expelled, second-stage labor did not progress. Since the fetus was not found during an endoscopic examination of the ...
Carothers, Randolph Erwin
Two trials were conducted to determine the effects of progesterone administered by controlled intravaginal drug release devices (CIDRs) on pregnancy rates and serum progesterone concentrations in heat stressed dairy cows. Trial 1 utilized a CIDR from days 5 through 12 after breeding, and trial 2 utilized a CIDR from days ...
Møller A P - - 2006
1. Bird ringing schemes have collected immense amounts of data on timing of breeding for over 100 years. These data provide an unexploited source of information on temporal change in breeding date. 2. We investigated changes in breeding date of the Arctic tern Sterna paradisaea Pont. in Denmark during 1929-98, ...
Amory J R - - 2006
A 3-point locomotion scoring system was used that incorporated the position of the back of cows while standing and when walking to investigate risk factors for elevated locomotion scores of 1,450 dairy cows on 19 farms in The Netherlands. Each of the farms was visited twice in an 18-mo period ...
Eliashar Ron - - 2006
OBJECTIVES: Halofuginone is a low-molecular weight quinazolinone alkaloid coccidiostat that inhibits collagen type I synthesis, extracellular matrix deposition, and angiogenesis. This study was conducted to assess its potential in preventing subglottic stenosis (SGS). METHODS: We induced SGS in 10 dogs randomly divided into 2 groups. Each group received treatment between ...
McDougall S - - 2007
Endometritis reduces reproductive performance in dairy cattle. Diagnosis of endometritis is undertaken using a variety of techniques including vaginoscopy, manual examination, cytology and ultrasonography. The current studies compared a novel test device ("metricheck") that is inserted into the vagina with vaginoscopy and then examined the relationship between the metricheck test ...
El-Wishy A B - - 2007
Prolonged postpartum acyclicity (absence of ovarian cyclic activity) and anestrum (absence of overt estrous signs) are major sources of economic loss to buffalo breeders. Studies on the epidemiology of these two problems are highly recommended to achieve successful control. Review of the available literature on controlled studies in dairy buffaloes ...
Ståhl K - - 2006
We used a prospective seroepidemiological approach to investigate endemic abortion in a dairy herd in Arequipa, Peru, and its association with Neospora caninum and bovine viral-diarrhoea virus (BVDV) infections. Between January 2002 and March 2004, 1094 pregnancies were confirmed in 538 cows. Of these, 137 pregnancies (13%) in 121 cows ...
Morris S T - - 2006
AIM: To examine of the influence of liveweight (LW), condition (CS) and age of dam on inter-calving interval (ICI), date of calving, days from joining to calving, and birth and weaning weights of calves. METHODS: LW and CS were measured in a herd of mixed-aged (3-8 years) Hereford x Friesian ...
Tóth F - - 2006
This trial was conducted on a Hungarian dairy farm between July 2001 and December 2004. The objective of this work was to improve the reproductive efficiency with relatively high milk production. At the beginning of this trial blood and fodder samples were taken for checking the metabolic status of the ...
Cairoli Fausto - - 2006
Serum collected in a time-course mode during the pregnancy of a group of heifers was analyzed by 2-DE under various experimental conditions to optimize resolution of all protein spots. Changes in the levels of some components were detected during the last phase of pregnancy and early postpartum. These included a ...
Franco M - - 2006
One strategy for improving fertility in cattle is mid-cycle administration of GnRH to increase progesterone secretion and delay luteolysis. This strategy might be especially useful during hot weather because heat stress increases uterine prostaglandin release and reduces development of the elongating embryo. A series of experiments was conducted to test ...
Staubli Daniela - - 2006
The present study was designed to exploratively determine (a) how many healthy calves, born from seropositive mothers, were also precolostrally seropositive; (b) how many precolostrally negative calves became postcolostrally positive; and (c) in these calves, how the IgG1/IgG2 situation developed pre- and postcolostrally. All calves were born from mothers that ...
Khongdee S - - 2006
Fourteen animals of second and third lactation of Thai Friesian crossbred cows (87.5% Friesian x 12.5% Bos indicus) located at Sakol Nakhon Research and Breeding Centre, Department of Livestock Development, Ministry of Agriculture and Cooperatives, were divided randomly into two groups of seven each to evaluate the effects of evaporative ...
Bowers Susan - - 2006
Postpartum production performance of dairy heifers may be enhanced by prepartum milking by alleviating the stress of the periparturient period. The objective of this study was to determine the impact of prepartum milking of dairy heifers on postpartum reproduction, udder health, milk production and other associated production characteristics. Pregnant heifers ...
Laven R A - - 2006
Synchronisation, using a combination of gonadotrophin-releasing hormone and prostaglandin F2alpha injections, is commonly used to control the reproductive cycle of dairy cows. A simple model that could predict the monetary return from synchronisation would be a valuable tool in determining whether it would be worthwhile. This study used data from ...
Melendez Pedro - - 2006
OBJECTIVE: To determine the effect of a controlled-release monensin capsule administered at cessation of lactation on incidence of calving-related disorders, fertility, and milk yield in dairy cows. ANIMALS: 290 dairy cows treated with monensin and 290 untreated control cows. PROCEDURE: Treated cows received a capsule that released monensin at 335 ...
Sah Shyam Kishore - - 2006
Repeat breeding is one of the most important reproductive disorders in buffaloes. Its etiology, however, is not well described. The aim of this study was to show the clinical features of repeat breeding buffaloes referred to infertility camps in the southern region of Nepal. Eighty-five buffaloes mated three times or ...
Pyykönen Teija - - 2007
The aim of our study was to assess the effects of aviation noise on reproduction and cub mortality in farmed blue foxes. Eighty artificially inseminated blue fox vixens (45 primiparous and 35 multiparous) were exposed to aviation noise on 5 days when they were pregnant or had cubs. The noise ...
Häsler Barbara - - 2006
We conducted a longitudinal study to follow-up the anti-Neospora caninum serologic status in 30 initially seropositive and 83 initially seronegative cows during their pregnancy. Study cows were blood-sampled every other month during pregnancy until parturition. Blood serum samples were screened for anti-N. caninum antibodies by ELISA. Cows that seroconverted were ...
Kauffold Johannes - - 2007
A field study was conducted to investigate the effectiveness of a treatment with altrenogest, eCG and hCG or the GnRH-analogue D-Phe(6)-LHRH to synchronize estrus and ovulation of sows diagnosed as non-pregnant in order to reintegrate them back into a scheduled fixed-time insemination program. Sows (n=531) diagnosed as non-pregnant by ultrasonography ...
Larson J E - - 2006
We determined whether a fixed-time AI (TAI) protocol could yield pregnancy rates similar to a protocol requiring detection of estrus, or estrous detection plus TAI, and whether adding a controlled internal device release (CIDR) to GnRH-based protocols would enhance fertility. Estrus was synchronized in 2,598 suckled beef cows at 14 ...
Nakada Ken - - 2006
Reproductive efficiency and performance in dairy cattle has been declining over the last 20 years in Japan. Recently, this has resulted in serious problems in dairy herds. There have been changes in the animals themselves and in the animal's environment, e.g. the genetic potential for milk yield has improved, the ...
Schönfelder Axel M - - 2006
To report a technique for intra-partum ovariohysterectomy (OVH) in cows after severe uterine compromise after uterine torsion. Clinical case report. Four cows with uterine torsion. After a ventrolateral cesarean section, uterine closure, and uterine detorsion, the laparotomy incision was elongated (20 cm) caudally so that the uterus can be completely ...
De los Reyes M - - 2006
The aim of the study was to investigate the histological characteristics and steroid concentrations in follicular fluid of different populations of follicles at different stages of development, during pregnancy and the oestrous cycle in cows. Follicles from ovaries collected at a slaughterhouse were allocated into three size categories (small, 2-5.9 ...
Draeger Reid W - - 2006
OBJECTIVES: To test wound debridement efficacy and soft tissue damage produced by high-pressure pulsatile lavage (HPPL), suction irrigation, and bulb syringe irrigation. DESIGN: Randomized trial in an in vitro model. SETTING: Medical school orthopaedic department. PATIENTS/PARTICIPANTS: No patients were used in this study. INTERVENTION: Beef flank steaks (100-g +/- 10-g) ...
Sparkes Andrew H - - 2006
This study was based on a convenience-sampling questionnaire study of pedigree cat breeding in the UK. Data were collated for the births of 1,056 litters from 14 different pedigree breeds and 942 different households. Significant relationships between various outcomes and relevant predictors were assessed by multiple linear regression or logistic ...
López-Gatius F - - 2007
This study was designed to establish possible factors affecting plasma pregnancy-associated glycoprotein (PAG) concentrations during early pregnancy in high producing dairy cows with live fetuses. Blood samples were obtained on days 35, 42, 49, 56 and 63 of gestation from 80 lactating cows in two herds carrying live fetuses. Radioimmunoassay ...
Starbuck M J - - 2006
The local relationship between the pregnant uterine horn and the CL during maternal recognition of pregnancy is well-documented. It continues beyond that time; pregnancies were maintained in lutectomized cows when CL were induced on the ovary ipsilateral, but not contralateral, to the uterine horn of pregnancy during Days 28-53. This ...
Shamsuddin M - - 2006
This study focused on the use of radioimmunoassay of progesterone in milk for the diagnosis of post-partum ovarian cyclicity and accurate detection of oestrus and non-pregnancy in cows in the artificial insemination (AI) programme in Bangladesh. In Investigation 1, milk samples were collected on day 0 (day of AI), day ...
Grimard B - - 2006
The objective of this study was to identify factors affecting variation in conception rate to first artificial inseminations (AI) (CR: number of pregnant cows on D80-100/inseminated cows) and the incidence of embryonic/foetal loss (LEM) between 21 and 80 days of pregnancy (number of cows non-pregnant on D80-100/pregnant on D21) in ...
Kanuya N L - - 2006
The objectives of this study were to assess changes in nutritional status/body condition score, percentage pregnancy and calving rate in Zebu cows and to establish the relationship between body condition score loss and postpartum interval to resumption of ovarian activity. A total of 198 cows and postpubertal heifers of the ...
Adamec V - - 2006
Dystocia scores were recorded by producers on 120,434 Holsteins (218,213 records) from 1985 through 1996; dystocia scores 3 to 5 were coded as difficult births. Stillbirths were recorded for deaths within the first 48 h after birth. Data were restricted to registered cows for pedigree completeness, and inbreeding coefficients were ...
Ushiroyama Takahisa - - 2006
This study was carried out to evaluate the clinical efficacy of Xiong-gui-jiao-ai-tang (Kyuki-kyogai-to), a traditional Chinese herbal medicine, in the treatment of threatened abortion in early pregnancy. We enrolled 72 women diagnosed with threatened abortion at Osaka Medical College Hospital and assigned them at random to the following two groups: ...
Campanile Giuseppe - - 2006
The relationship of body condition score (BCS) and blood urea and ammonia to pregnancy outcome was examined in Italian Mediterranean Buffalo cows mated by AI. The study was conducted on 150 buffaloes at 145 +/- 83 days in milk that were fed a diet comprising 14.8% crude protein, 0.9 milk ...
Maillard R - - 2006
Bartonella spp. are small hemotropic bacteria infecting mammals. Four Bartonella species have been recently described in cattle and wild ruminants. To date, the biology and possible pathogenic role of Bartonella species isolated from ruminants are poorly understood. Therefore, a dairy herd of 448 cows and heifers was surveyed in order ...
van Nederkassel A M - - 2006
This study describes the chemometric treatment of vanillin fingerprint chromatograms to distinguish vanillin from different sources. Prior to principal component analysis, which is used to discriminate vanillin from different origins, the fingerprints are aligned. Three alignment algorithms are tested, correlation optimized warping (COW), target peak alignment (TPA) and semi-parametric time ...
Waldner C L - - 2005
Neospora caninum, infectious bovine rhinotracheitis (IBR), and bovine viral diarrhea virus (BVDV) are important differentials for the diagnosis of infectious reproductive loss in beef herds. The objective of this study was to describe the serological status of both pregnant and non-pregnant beef cows from herds with varying levels of reproductive ...
Shephard R W - - 2005
OBJECTIVE: To compare performance of the Ovsynch program on reproductive performance between cycling and non cycling cows in seasonally-calving herds. PROCEDURE: An Ovsynch mating program (100 mg Gonadorelin on day 1 and day 9, 500 mg of Cloprostenol on day 7 with fixed time artificial insemination on day 10) was ...
Asher G W - - 2005
Low reproductive productivity of young red deer (Cervus elaphus) hinds on New Zealand deer farms appears to reflect high incidences of puberty failure at 16 months of age. This is despite the general attainment of average liveweights 15-25 kg in excess of the accepted minimum threshold for puberty in subspecies ...
Kasimanickam R - - 2006
Two experiments were conducted to investigate the effects of timing of prostaglandin F2(alpha) (PGF2(alpha)) administration, controlled internal drug release device (CIDR) removal and second gonodotropin releasing hormone (GnRH) administration on the pregnancy outcome in CIDR-based synchronization protocols. In Experiment 1, suckled Angus crossbred beef cows (n = 580) were given ...
Baruselli Pietro S - - 2006
Compared to Bos taurus breeds, Bos indicus breeds of cattle present several differences in reproductive physiology. Follicular diameter at deviation and at the time of ovulatory capability are smaller in B. indicus breeds. Furthermore, B. indicus breeds have a greater sensitivity to gonadotropins, a shorter duration of estrus, and more ...
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