scholarly journals Insemination factors affecting the conception rate in seasonal calving Holstein-Friesian cows

2003 ◽  
Vol 43 (6) ◽  
pp. 543-555 ◽  
Author(s):  
Frank Buckley ◽  
John Mee ◽  
Kathleen O'Sullivan ◽  
Ross Evans ◽  
Donagh Berry ◽  
...  
Keyword(s):  
Conception Rate ◽  
Factors Affecting ◽  
Holstein Friesian ◽  
Friesian Cows

Comparison of reproductive responses after PGF2α and GnRH-PGF2α oestrous synchronisation schemes in Holstein cows

2001 ◽  
Vol 26 (2) ◽  
pp. 467-470
Author(s):  
J.F. Cox ◽  
F. Saravia ◽  
O. Torrealba ◽  
A. Zavala ◽  
A. Lobos
Keyword(s):  
Dairy Cows ◽  
Corpus Luteum ◽  
Detection Efficiency ◽  
Post Partum ◽  
Conception Rate ◽  
Milk Samples ◽  
Reproductive Response ◽  
Holstein Friesian ◽  
Breeding Schemes ◽  
Friesian Cows

AbstractControlled breeding schemes for oestrous detection constitutes a proactive technical response that balances the infrastructural requirement for a profitable dairy operation and the demands for optimal animal performance. The present study compared (a) the reproductive response of a treatment based on a short vs longer-acting PGF2α analogue (tiaprost vs luprostiol), and (b) the reproductive response after a treatment of GnRH-PGF2α vs PGF2α alone for synchronizing dairy cows. Holstein-Friesian cows averaging 9000 kg milk/lactation and fed according to their requirements were used in the study. Cows were cyclic, at least 60 days post partum and were clinically sound before being considered for the experiments. In Experiment 1, animals were synchronised using an i.m. injection of either 15 mg of luprostiol or 0.75 mg of tiaprost, based on ultrasonic diagnosis of a corpus luteum. Animals were inseminated at observed oestrus. In Experiment 2, cows were synchronised, at random, by either an injection of 10pg ofbuserelin (day 0) followed by 0.75 mg of tiaprost at day 7 (GnRH-PGF2α) orjust 0.75 mg of tiaprost (PGF2α). For both treatments only cows with an ultrasonically detected corpus luteum were treated. Animals were inseminated at oestrus. At the time of treatment and again 3 days later, milk samples were collected and assayed for progesterone by RIA. Cows with progesterone concentrations >1 ng/ml were considered to have corpus luteum. Luteolysis was considered to have occurred when concentrations of progesterone were > 1 ng/ml at day 0 and <0.8 ng/ml at day 3. In Experiment 1, both analogues gave similar results in terms of induced luteolysis [luprostiol: 36/39 (92.3%) vs tiaprost: 36/41 (87.8%)], oestrous detection efficiency [luprostiol: 26/36 (72.2%) vs tiaprost: 30/36 (83.3%], oestrous distribution [day 2, 3 and 4, respectively: luprostiol: 26.9%, 50.0%, 19.2% vs tiaprost: 36.7%, 50.0%, 13.3%], and conception rates [luprostiol: 12/25 (48.0%) vs tiaprost: 14/28 (50.0%); P>0.05]. In Experiment 2, oestrous detection efficiency, interval to oestrus and conception rate were similar between treatments [97/149 (65.1%), 71.1 h, 43/95 (45.3%) for PGF2α vs 130/188 (69.1%), 68.2h, 65/126 (51.6%) for GnRH-PGF2α, respectively]. However the oestrous distribution was more concentrated in GnRH-PGF2α treated animals (P<0.01).

scholarly journals Factors Affecting Conception Rate in Holstein Friesian Crossbreed Cattle in Maharashtra State, India

2020 ◽  
Vol 9 (3) ◽  
pp. 2336-2341
Author(s):  
V. V. Potdar ◽  
Y. S. Gaundare ◽  
J. R. Khadse ◽  
Sachin Joshi ◽  
Mari muthu ◽  
...  
Keyword(s):  
Conception Rate ◽  
Factors Affecting ◽  
Holstein Friesian

Effect of abnormal vaginal discharge at oestrus on conception rate after artificial insemination in cows

2001 ◽  
Vol 72 (3) ◽  
pp. 535-538 ◽  
Author(s):  
A. R. Mahmoudzadeh ◽  
M. Tarahomi ◽  
H. Fotoohi
Keyword(s):  
Artificial Insemination ◽  
Dairy Herd ◽  
Normal Group ◽  
Cervical Mucus ◽  
Conception Rate ◽  
Holstein Friesian ◽  
Conception Rates ◽  
Mucous Discharge ◽  
Abnormal Group ◽  
Friesian Cows

AbstractDuring a 2-year study from January 1997 to December 1999, the visual characteristics of the cervical mucous discharge of cows and heifers in oestrus and their relations to conception rate were studied in a large dairy herd of Holstein-Friesian cows. Cows were divided into two groups based on mucous discharge being of normal or abnormal appearance and the group with abnormal discharge was further divided into the following classes: cervical mucus with urine (CMU), cervical mucus with microbes (CMM), cervical mucus with blood (CMB) and a group with no cervical mucus (NCM). From 6169 cases of cows in oestrus, 82·2% had normal discharge, and the remaining 17·8% had abnormal discharge classifications (6·1% CMU, 5·1% CMM, 0·5% CMB and 6·1% NCM). Conception rate after artificial insemination (AI) in the normal group (38·3%) was significantly higher than that of the abnormal group (27·9%), (P < 0·05). When the conception rate of the normal group was compared with each one of the abnormal classifications, it was significantly different from that of CMU (26·5%), CMM (22·6%) and CMB (21·8%), (P < 0·05), but not from that of NCM (34·4%), (P > 0·05). From 1734 cases of heifers in oestrus, only 6% had abnormal discharges, and the conception rates of the normal and abnormal groups were not significantly different (P > 0·05).We conclude that AI of cows in oestrus discharging cervical mucus that is contaminated with urine, microbes or blood produces conception rates significantly lower than those of cows discharging a normal and clear mucus. Absence of a cervical mucous discharge at the time of AI of cows does not imply a low conception rate. In the case of heifers, appearance of cervical mucus had no effect on the conception rate after AI.

Factors affecting reproductive performance in German Holstein–Friesian cows with a special focus on postpartum mastitis

2004 ◽  
Vol 86 (1-3) ◽  
pp. 233-238 ◽  
Author(s):  
I.C. Klaas ◽  
U. Wessels ◽  
H. Rothfuss ◽  
B.-A. Tenhagen ◽  
W. Heuwieser ◽  
...  
Keyword(s):  
Reproductive Performance ◽  
Special Focus ◽  
Factors Affecting ◽  
Holstein Friesian ◽  
Friesian Cows

scholarly journals Influence of GnRH-gonadoreline and prostaglandine F2α-dinoprost application on reproduction parameter values in dairy cows with puerperal endometritis

2009 ◽  
Vol 63 (5-6) ◽  
pp. 269-283
Author(s):  
Mustafa Sabanovic ◽  
Nevres Paprikic ◽  
Ahmet Suljkanovic ◽  
Jako Miljas ◽  
Miodrag Lazarevic
Keyword(s):  
Dairy Cows ◽  
Post Partum ◽  
Hormonal Treatment ◽  
Conception Rate ◽  
Reproductive Parameters ◽  
Control Groups ◽  
Holstein Friesian ◽  
Parameter Values ◽  
Friesian Cows

This paper presents results of investigations of gonadoreline application (14-16, 17-20 and 21-25 days post partum) influence, followed by prostaglanin F2 ? ten days later, on the reproductive parameters of dairy cows with difficult calving and endometritis. The study was carried out on a total of 92 Holstein-Friesian cows. Fifty of them treated with hormones, while 42 animals served as controls, receiving placebo injections. Analysis of the results in cows with postpartal endometrits revealed that mean anoestrus period, open days period and intervals between calving were significantly lower in cows that underwent hormonal treatment, when compared to the controls. The period from gonadoreline application, followed by prostaglandin injection, to conception was shorter by 44, 28 and 14 days respectively when compared to the control groups. The total conception rate from the first three artificial inseminations was higher in the experimental groups in comparison to the controls. .

scholarly journals Variation of Blood Metabolites of Brown Swiss, Holstein-Friesian, and Simmental Cows

Animals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 271 ◽  
Author(s):  
Anna Benedet ◽  
Marco Franzoi ◽  
Carmen L. Manuelian ◽  
Mauro Penasa ◽  
Massimo De Marchi
Keyword(s):  
Infrared Spectra ◽  
Prediction Models ◽  
Early Summer ◽  
Blood Metabolites ◽  
Mid Infrared ◽  
Factors Affecting ◽  
Brown Swiss ◽  
Esterified Fatty Acids ◽  
Holstein Friesian ◽  
Friesian Cows

Serum metabolic profile is a common method to monitor health and nutritional status of dairy cows, but blood sampling and analysis are invasive, time-consuming, and expensive. Milk mid-infrared spectra have recently been used to develop prediction models for blood metabolites. The current study aimed to investigate factors affecting blood β-hydroxybutyrate (BHB), non-esterified fatty acids (NEFA), and urea nitrogen (BUN) predicted from a large milk mid-infrared spectra database. Data consisted of the first test-day record of early-lactation cows in multi-breed herds. Holstein-Friesian cows had the greatest concentration of blood BHB and NEFA, followed by Simmental and Brown Swiss. The greatest and the lowest concentrations of BUN were detected for Brown Swiss and Holstein-Friesian, respectively. The greatest BHB concentration was observed in the first two weeks of lactation for Brown Swiss and Holstein-Friesian. Across the first month of lactation, NEFA decreased and BUN increased for all considered breeds. The greatest concentrations of blood BHB and NEFA were recorded in spring and early summer, whereas BUN peaked in December. Environmental effects identified in the present study can be included as adjusting factors in within-breed estimation of genetic parameters for major blood metabolites.

Field assessment of GnRH-PGF2α oestrous synchronisation in confined Holstein cows

2001 ◽  
Vol 26 (2) ◽  
pp. 461-466
Author(s):  
J.F. Cox ◽  
F. Saravia ◽  
O. Torrealba ◽  
A. Zavala ◽  
A. Lobos
Keyword(s):  
Corpus Luteum ◽  
Detection Rate ◽  
Conception Rate ◽  
Response To Treatment ◽  
Milk Samples ◽  
Subsequent Fertility ◽  
Artificial Breeding ◽  
Holstein Friesian ◽  
Field Assessment ◽  
Friesian Cows

AbstractThe present study determined the effect of a GnRH and PGF2α treatment on proportion of cows detected in oestrus, the distribution of oestrous activity and subsequent fertility. The study also incorporated the use of ovarian ultrasound and milk progesterone assay to established a better overall assessment of treatments. Holstein-Friesian cows, averaging 9000-kg milk/lactation, and fed according to their requirements were used in the study. Cows were regularly cyclic; at least 60 days postpartum, had had two oestrous cycles and were clinically sound before being considered for either experiment. In Experiment 1, 274 cows were treated at random with an i.m. injection of 10 μg of GnRH (buserelin) followed 7 days later by 0.75 mg oftiaprost based on the ultrasound diagnosis of a corpus luteum. At that time and 3 days later, milk samples were collected and assayed for progesterone. Cows with progesterone concentrations >1 ng/ml were considered to have a corpus luteum, and luteolysis was assumed to have occurred when concentrations 3 days later were <0.8 ng/ml. In Experiment 2, 1431 cows were treated as above. The response to treatment was assessed by presence of a corpus luteum 7 d after GnRH treatment, oestrous detection rate, and distribution of heats and ultimately on conception rate. Conception rate was compared to untreated control cows inseminated by the same inseminator and using semen from the same sires. Artificial breeding was carried out after oestrous detection and pregnancy diagnosis was done by ultrasound. In Experiment 1, luteolysis was induced in 244/274 (89.1%) cows following PGF2α administration, with 198/214 (92.5%) been diagnosed correctly in heat and 16/214 (7.5%) been diagnosed in error based on progesterone profiles. Oestrous activity was most concentrated on day 3 (59.1%), with 20.7% and 16.7% of heats recorded on d 2 and d 4, respectively. When compared to untreated controls, GnRH-PGF2α treated cows had a better conception rate (56.6 vs. 39.5%, P<0.01). In Experiment 2, 1012/1431 (70.7%) had a CL 7 days after GnRH injection; 709/1012 (70.1%) cows were detected in oestrus, and 359/700 (51.3%) cows became pregnant after insemination compared to 182/434 (41.9%) of untreated controls (P<0.05). The utilisation of GnRH and PGF2α seems to be a useful synchronisation scheme based on AI after oestrous detection. However, variations in fertility after treatment demands a better understanding offactors affecting herd fertility under controlled schemes.

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