the objective was to quantify and compare cow cervical morphology on oestrus vs. non-oestrus daysusing a new farm technology. the cervical tissues were videotaped using a cervixscope involving newcamera equipment in four holstein cows on multiple oestrus and non-oestrus days to score tissue morphology as altered by oestrus. the non-oestrous days were in diestrus phases. the videotaped records w...

This study predicts the magnitude and between herd variation in changes of methane emissions and production efficiency associated with interventions to improve reproductive efficiency in dairy cows. Data for 10,000 herds of 200 cows were simulated. Probability of conception was predicted daily from the start of the study (parturition) for each cow up to day 300 of lactation. Four scenarios of d...

Ustuner B., U. Gunay, Z. Nur, H. Ustuner: Effects of Long and Short-Term Progestagen Treatments Combined with PMSG on Oestrus Synchronization and Fertility in Awassi Ewes During the Breeding Season. Acta Vet. Brno 2007, 76: 391-397. Synchronization of oestrus has been used to increase reproductive effi ciency in most animals, including ewes. The aim of the present study was to compare the effec...

Six priming doses of 40 mg progesterone at two day intervals followed by 1,000 I.U. P.M.S. were superior to two priming doses plus P.M.S. in inducing oestrus. At the first insemination after induction of oestrus, fertility was normal in animals which received two doses, but depressed in those which received six doses of progesterone. An injection of 40 mg of progesterone after the injection of ...

Prostaglandin F~(Y, (PGF2a) causes luteolysis in several species of animals including cattle and sheep. This has led to investigations with PGF2a as an agent for the control of oestrus and ovulation in domestic animals (Inskeep 1973) and to comparison of PGF2a and progestins as practical methods of synchronizing oestrus in cattle (Smith 1973). This paper reports preliminary studies of the use o...

Oestrus was induced 4-7 days after treatment with Cloprostenol (ICI 80,996) in gilts between 12 and 40 days pregnant. Fertility at this synchronized oestrus was good (85%).

Up to 50% of ovulations go undetected in modern dairy herds due to attenuated oestrus behavior and a lack of high-accuracy methods for detection of fertile oestrus. This significantly reduces overall herd productivity and constitutes a high economic burden to the dairy industry. MicroRNAs (miRNAs) are ubiquitous regulators of gene expression during both health and disease and they have been sho...

The use of exogenous gonadotrophins in puberty inducement and ovulation synchronization is a technique that has a positive influence on the management of swine. The purpose of this study was to verify the effects of a second gonadotrophin treatment [equine chorionic gonadotrophin (eCG) and luteinizing hormone (LH), intramuscularly (i.m.)] upon the second oestrus synchronization and fertility in...

Thyroidal function in goats as estimated by PBI values of blood serum showed a very high activity in oestrus, followed by that in pregnancy state. There was significant increase in PBI values between oestrus and non-pregnancy groups. The lack of significance between pregnancy and non-pregnancy values has been explained. Mean PBI values in oestrus, pregnancy and non-pregnancy were respectively 5...

Oestrous intensity is positively associated with reproductive outcome in high-Abstract This study tested whether strong oestrus symptoms are linked to low lameness score, acceptable pregnancy and calving rates in heifers and first parity dairy cows with a high genetic potential for milk production. In a single Swedish nucleus herd for genetic selection and testing, oestrous intensity was determ...