Efficacy of a combined protocol for re-insemination of open cows after early pregnancy diagnosis using ultrasonography and its effect on fertility
Journal Title: Open Veterinary Journal - Year 2013, Vol 3, Issue 4
Abstract
The objective of the present field study was to establish the beneficial effects of re-insemination of non-pregnant cows using ultrasonography 20 to 23 days after the artificial insemination. A total of 245 Japanese Black cows were artificially inseminated and early pregnancy diagnosis (EPD) was performed on 92 cows 20 days after insemination, using ultrasonography. The remaining 153 cows were considered as negative controls in which routine rectal palpation was performed for pregnancy diagnosis 45-50 days post-insemination. EPD revealed that eleven of the 92 cows (12%) were infertile due to ovarian abnormalities and were thus excluded from the rest of the study. Fortyeight (59%) of the remaining 81 cows were diagnosed as pregnant, while the other 33 (41%) were diagnosed as nonpregnant. Of these non-pregnant cows, 17 of them received a dose of an analogue of the gonadotropin-releasing hormone (GnRH analogue) and were then timed-inseminated, while the other 16 were observed for estrus signs, and 13 of them (81%) were artificially inseminated. Rates of conception were 35% and 38% in the GnRH and the artificially inseminated groups, respectively (P>0.05). Total pregnancy rate for the EPD group increased significantly (74%) (P<0.01) when compared to the control cows (54%) within the same period. In conclusion, our field study demonstrated that re-insemination of non-pregnant cows following EPD is highly efficacious not only in improving the rate of fertility via reducing inter-insemination and inter-calving intervals, but also aids in the early detection of ovarian disorders.
Authors and Affiliations
A. O. Gaja| Department of Surgery and Theriogenology, Faculty of Veterinary Medicine, University of Tripoli, Tripoli, Libya, S. Y. A. Al-Dahash| Department of Surgery and Theriogenology, Faculty of Veterinary Medicine, University of Tripoli, Tripoli, Libya, C. Kubota| Laboratory of Theriogenology, Department of Veterinary Medicine, Faculty of Agriculture, Kagoshima University, Kagoshima city, Kagoshima province, Japan, T. Kojima| Laboratory of Theriogenology, Department of Veterinary Medicine, Faculty of Agriculture, Kagoshima University, Kagoshima city, Kagoshima province, Japan, I. Hatazoe| Kagoshima Agriculture Cooperative Associations, Kagoshima city, Kagoshima province, Japan
Keywords
Related Articles
- EP ID EP9278
- DOI -
- Views 396
- Downloads 28
Occurrence and surgical repair of third degree perineal lacerations in adult female camels (Camelus dromedarius) by one-stage (Goetz) technique
Retrospective analysis of third degree perineal lacerations in 7 female camels (6-17 yrs of age) that were surgically corrected by one stage repair (Goetz technique) is presented. Majority (3/7) of the camels was primip...
Double filtration plasmapheresis in a dog with multiple myeloma and hyperviscosity syndrome
A 12 year old, 38 kg, mix-breed, intact male dog presented with a 20 day history of clinical signs consistent with hyperviscosity syndrome secondary to multiple myeloma. The dog received three double filtration plasmaph...
Haemato-biochemical and endocrine profiling of north western Himalayan Gaddi s heep during various physiological/reproductive phases
The study was aimed to provide baseline data regarding haemato-biochemical and endocrine profiling of Gaddi sheep found in north western Himalayan region of Himachal Pradesh, India. Each random sample was collected from...
Proliferation, angiogenesis and differentiation related markers in compact and follicular-compact thyroid carcinomas in dogs
Immunohistochemical markers (IGF-1, IGF-1R, VEGF, FGF-2, RARα and RXR) were evaluated in healthy canine thyroid glands (n=8) and in follicular-compact (n=8) and compact thyroid carcinomas (n=8). IGF-1, IGF-1R and VEGF...
Cytokine expression in malaria-infected non-human primate placentas
Malaria parasites are known to mediate the induction of inflammatory immune responses at the maternal-foetal interface during placental malaria (PM) leading to adverse consequences like pre-term deliveries and abortions...