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Showing 1 to 20 of 22 for “"Oestrus"”.
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Assessing the impact of lameness on fertility and oestrus behaviour of dairy cattle: A comparison of oestrus detection methods with the evaluation of a modern detection method
… welfare and reproductive performance, including oestrus expression and intensity. Despite extensive research, lameness continues to affect dairy cow populations. This study assessed the impact of lameness on fertility and oestrus behaviour of dairy cattle. The objectives of this research were: 1) …
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Effect of the Duration of Progesterone Treatment on Synchronising Oestrus outside the Natural Breeding Season in Merino Ewes
… Overall, the mean interval to the onset of oestrus in this study was 46.8 ± 1.4 hours. Most ewes began exhibiting oestrus at 24 and 36 h post controlled internal drug release withdrawal. There was no significant difference (P = 0.07) in the mean interval to the onset of oestrus between the …
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Effects of ovulation-inducing drugs on pregnancy rates of cattle in rural areas after synchronized oestrus and artificial insemination
… (Cidirol). During day 8 to 9 signs of possible oestrus were visually observed by cattle owners three times a day for a minimum of 30 minutes a time. From day 9 to 10, Al was performed following the AM/PM rule by the same technician using good quality frozen-thawed semen 12 hours after the …
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ΜΕΤΑΒΟΛΕΣ ΙΔΙΟΤΗΤΩΝ ΤΗΣ ΤΡΑΧΗΛΙΚΗΣ ΒΛΕΝΝΑΣ ΤΟΥ ΠΡΟΒΑΤΟΥ ΥΣΤΕΡΑ ΑΠΟ ΣΥΓΧΡΟΝΙΣΜΟ ΤΟΥ ΟΙΣΤΡΟΥ ΚΑΙ ΕΠΙΔΡΑΣΗ ΤΟΥΣ ΣΤΗ ΣΥΜΠΕΡΙΦΟΡΑ ΤΩΝ ΣΠΕΡΜΑΤΟΖΩΑΡΙΩΝ
… OF CERVICAL MUCUSAT VARIOUS STAGES OF THE OESTRUS CYCLE IN EWES AFTER OESTRUS SYCHRONIZATION. IN THE SAME TIME THE CHANGES IN THE ABOVE PROPERTIES WERE CORRELATED WITH THE CHANGES IN THE CONCENTRATIONS OF PROGESTERONE AND OESTRADIOL-17B IN BLOOD PLASMA.ON EVALUATION OF THE RELEVANT RESULTS …
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Managing the lactating sow to stimulate lactation ovulation
In lactation, sows are typically anoestrus, with ovulation occurring three to seven days after weaning at approximately 24 days post-partum. Increasing piglet age to greater than 28 days improves piglet performance and welfare; however, it also results in reduced sow farrowing frequencies, making …
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ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΗΣ ΜΕΤΟΙΣΤΡΙΑΣ ΑΙΜΟΡΡΑΓΙΑΣ ΤΩΝ ΑΓΕΛΑΔΩΝ ΚΑΙ ΜΟΣΧΙΔΩΝ
… ANIMALS) WAS 48 HOURS AFTER THE ONSET OF OESTRUS. THE SILENT OESTRUS APPEARED TO A PERCENTAGE OF 12,27 IN THE ANIMALS WITH M.B. WHILE AMONG THE ONES WHICH SHOWED NO BLEEDING (CONTROLS) SILENT OESTRUS APPEARED TO A PERCENTAGE OF 1,63% (P<0,001). THE CONCENTRATION OF CA, P, PROGESTERONE AND …
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Cervical artificial insemination in sheep
… vagina (A.V.). Fixed-time insemination versus on-oestrus insemination and 'synchronised on-oestrus' versus 'natural on-oestrus' were compared. 'On-time' ewes (TI) were inseminated at 50-51 hours after CIDR withdrawl. On-oestrus treatments (T2 and T3) were drafted twice daily and inseminated on …
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Management and nutrition of the replacement gilt.
… mating gilts at either the pubertal or second oestrus on ovulation rate and early embryo survival. Gilts were artificially inseminated at the allocated oestrus, with the reproductive tracts collected at 22.8 ± 0.4 days after first mating (mean ± S.E.M), and the numbers of corpora lutea and …
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ΗΛΙΚΙΑ ΤΗΣ ΗΒΗΣ ΚΑΙ ΧΑΡΑΚΤΗΡΙΣΤΙΚΑ ΤΗΣ ΠΡΩΤΗΣ ΟΙΣΤΡΙΚΗΣ ΠΕΡΙΟΔΟΥ ΑΜΝΑΔΩΝ ΤΩΝ ΦΥΛΩΝ ΧΙΟΥ ΚΑΙ ΚΑΡΑΓΚΟΥΝΙΚΗΣ ΣΕ ΣΧΕΣΗ ΜΕ ΤΟ ΕΠΙΠΕΔΟ ΔΙΑΤΡΟΦΗΣ
… (T3) IN THEBLOOD SERUM WERE MEASURED. OESTRUS WAS DETECTED DAILY BY TEASER RAMS AND THE OVARIAN ACTIVITY WAS MONITORED BY PROGESTERONE CONCENTRATION IN BLOOD SAMPLES COLLECTED TWICE WEEKLY. PROGESTERONE AND OESTRADIOL PROFILES AROUND SECOND PUBERTAL OVULATION WERE ALSO DETERMINED BY …
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An attempt to advance seasonal reproductive activity in stoats (Mustela erminea) by use of an artifical photoperiod: A dissertation submitted in partial fulfilment of the requirements of the Degree of Bachelor of Science with Honours at Lincoln University
… cytology and physical changes associated with oestrus were monitored in females and scrotal size was monitored in males. In early spring months there was a high incidence of keratinised vaginal epithelial cells and signs of oestrus in light-treated females that were absent in the controls. Mean …
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Untersuchungen zur Eignung von Empfängertieren im Rahmen des Embryotransfers
… 49. A blood sample (plasma) was taken on day 0 (oestrus), 7 (transfer) and 21, in order to mesure the progesterone concentration (P4). An enzyme-based immunological assay was used to evaluate the plasma samples for P4 concentration. The ultrasonographically defined area of the largest …
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Systemic Leptin Modulates the Expression of E-cadherin, β-catenin in the Ovary of Dietary-Induced Obese Infertile Rats
… diet (RCD) (n=6) or high fat diet (HFD) (n=14). Oestrus cycles were monitored daily until their cycles became irregular. 100 ug/ml of leptin was given intraperitoneally to HFD-fed rats (n=5) with irregular cycles. The control rats HFD (n=9) and RCD received saline. Leptin treatment restored …
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The Social System of the Round-Eared Sengi(Macroscelides proboscideus)
… females, favouring pre-copulatory and oestrus mate guarding. Males over-mark their females’ scent while following, possibly for concealing the females’ reproductive state and advertisement of the paired status, thereby decreasing the risk of intrusions by competitors. Mate guarding …
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Design, development and optimisation of veterinary intravaginal controlled release drug delivery systems
… and Six of this Thesis direct their focus to oestrus control in sheep. Chapter Five utilises information gained from both Rathbone et al. and the work performed in this Thesis on the CIDR® Cattle insert to characterise and optimise the commercially available sheep equivalent of the CIDR ® 1900 …
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Localization and distribution of estrogen receptors and progesterone receptors in the bovine ovary in relation to the cell dynamics
… van het rund. Deze cyclus werd ingedeeld in oestrus, metoestrus, vroege dioestrus, late dioestrus en prooestrus. De score voor ERα was laag in de ovariële follikels, de tunica albuginea en het oppervlakte-epitheel, maar was hoger in de cellen van het diepe en oppervlakkige stroma. Daarentegen …
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Movements and Behavior of Pheasants During the Breeding Cycle as Determined by Radio-Tracking
… in the home range where crowing occurred. The oestrus cycle of the hen pheasant in South Dakota lasts about two weeks during early nesting attempts, and 9-10 days during re-nesting attempts. Egg laying occurred after mid-day with the hen spending an increasing amount of time on the nest as the …
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The Influence of Ovarian Sex Steroids on Insulin Receptor Status in Mice
… insulin was significantly increased in mice at oestrus compared to mice at dioestrus, two stages of the oestrous cycle which represent high and low plasma concentrations of the ovarian sex steroids respectively. Unchanged insulin binding data suggested that this increase in insulin action was …
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A neural and behavioural investigation of aberrant feeding in animal models of autism spectrum disorder
… often focuses on males due to concerns about oestrus driven behavioural variability and the subtler presentation of ASD-related behaviours in females. However, feeding issues in ASD affect both sexes. To address this, I evaluated sucrose intake in female Cntnap2-/- mice and compared their …
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Fortpflanzungsphysiologie und assistierte Reproduktion beim Haushund (Canis familiaris) - eine Literaturstudie
… for synchronization and induction of a fertile oestrus cycle as well as superovulation by hormone treatment are not available. Canine oocytes may resume meiosis spontaneously in vitro, although at a much lower efficiency than in most other domestic species. In vitro maturation (IVM) of oocytes …
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Ecology of the eastern quoll dasyurus viverrinus, (Dasyrudae: Marsupialia)
… tl1a t females usually conceived on their first oestrus. Only one litter was reared each year due to the long period of growth (approximately two months in the pouch and two months in the den, June-October). Because females normally produced 5-6 young, large numbers of juveniles entered the …
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