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.

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 Effects of GnRH, PGF2α and oxytocin treatments on conception rate at the time of artificial insemination in lactating dairy cows

2011 ◽  
Vol 56 (No. 6) ◽  
pp. 279-283 ◽  
Author(s):  
A. Gümen ◽  
A. Keskin ◽  
G. Yilmazbas-Mecitoglu ◽  
E. Karakaya ◽  
S. Cevik ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Artificial Insemination ◽  
Reproductive Tract ◽  
Female Reproductive Tract ◽  
Conception Rate ◽  
Beneficial Effects ◽  
Lactating Dairy Cows ◽  
Conception Rates ◽  
Prostaglandin F ◽  
And Control

In several studies, hormones such as gonadotropin-releasing hormone (GnRH), prostaglandins and oxytocin were used to increase pregnancy rate by inducing ovulation and improving the sperm transport in the female reproductive tract in lactating dairy cattle. The objective of this study was to compare the effects of GnRH, prostaglandin F<sub>2&alpha;</sub> (PGF<sub>2&alpha;</sub>) and oxytocin treatments at the time of artificial insemination (AI) after spontaneous oestrus on the conception rate (CR) of lactating dairy cows. Oestrus was detected by visual observations by experienced personnel. All cows (n = 430, 308 Holstein-Frisian and 122 Swedish-Red dairy cows) were inseminated based on the am/pm rule by veterinarians of the farm. After AI, cows were alternately assigned to one of the four treatment groups: (1) GnRH (n = 113); (2) PGF<sub>2&alpha;</sub> (n = 106);<br />(3) oxytocin (n = 106) and (4) non-treated control (n = 105). Pregnancy diagnosis was performed 28&ndash;34 and 58&ndash;64 days post-insemination by transrectal ultrasonography. Conception rates on days 28&ndash;34 and 58&ndash;64 were not different among GnRH (46.0%; 52/113 and 44.3%; 50/113), PGF<sub>2&alpha;</sub> (37.7%; 40/106 and 35.9%; 38/106) and control (49.5%; 52/105 and 47.6%; 50/105) groups. However, conception rates were lower (P = 0.02) in oxytocin (31.1%; 33/106 and 30.2%; 32/106) than in GnRH and control groups on days 28&ndash;34 and 58&ndash;64. Other covariant factors, such as milk production, days in milk (DIM), breed, parity, service number did not affect the conception rate. Thus, there were no beneficial effects of treatments with GnRH and PGF2&alpha; at the time of AI, and oxytocin had an adverse effect on CR in lactating dairy cows in this study.

AN ANALYSIS OF THE CONTEMPORARY PRODUCTION OF ARTIFICIALLY AND NATURALLY SIRED CANADIAN HOLSTEIN–FRIESIAN COWS

1965 ◽  
Vol 45 (3) ◽  
pp. 133-140 ◽  
Author(s):  
A. H. Martin ◽  
J. C. Rennie ◽  
G. H. Bowman
Keyword(s):  
Artificial Insemination ◽  
Breeding Value ◽  
Seasonal Differences ◽  
Holstein Friesian ◽  
Class Average ◽  
The Difference ◽  
Equivalent Yield ◽  
Friesian Cows

A study of first-lactation records, collected under Canadian Record of Performance and involving 12,815 Holstein–Friesian heifers by A.I. (artificial insemination) sires, and 13,543 Holstein–Friesian heifers by non-A.I. sires, within the same herds and season, revealed a superiority in average breeding value of 4.62 ± 0.48 B.C.A. (breed class average) for milk and 4.98 ± 0.50 B.C.A. for butterfat in favor of the A.I. sires. Expressed in terms of mature equivalent yield the superiorities were 248 ± 26 kg (546 ± 57 lb) milk; and 9.8 ± 1.0 kg (21.6 ± 2.2 lb) butterfat. The difference in butterfat test between the two sire groups was not statistically significant.The total volume of data examined consisted of 33,425 records of cows of all ages. Cows mated to A.I. sires were shown to be slightly superior, both in milk and fat production, to cows mated to non-A.I. sires [Formula: see text]. Adjustment procedures for this source of bias are discussed.Important seasonal differences were demonstrated, emphasizing the necessity of comparisons on a within-season basis.

scholarly journals Rasio Jenis Kelamin Kelahiran Anak Kambing Peranakan Ettawa (PE) Hasil Inseminasi Buatan Menggunakan Spermatozoa Swim Up

2014 ◽  
Vol 14 (2) ◽  
pp. 132-138
Author(s):  
Sariadi Sariadi ◽  
Dasrul Dasrul ◽  
Muslim Akmal
Keyword(s):  
Veterinary Medicine ◽  
Sex Ratio ◽  
Analysis Of Variance ◽  
Artificial Insemination ◽  
Conception Rate ◽  
Treatment Groups ◽  
Multiple Test ◽  
Conception Rates

(The ratio of birth sex of ettawa crossbreed goat by artificial insemination using spermatozoa swim up)ABSTRACT. The aim of this research was to determine the ratio of birth sex of ettawa crossbreed goat by artificial insemination using spermatozoa swim up. This research was at Reproduction Laboratory Faculty of Veterinary medicine Syiah Kuala university and Livestock Group SMD, Bener Meriah Regency. Fifteen female goats with age 8-24 months where used in this study and divided into 3 treatment groups (P0, P1, P2) and 5 replications of each. The first group (P0) inseminated with sperm without swim up; P1 and P2 inseminated with sperm which swim up for 5 minutes (P1) and 10 minutes (P2). The result of conception rates observation and sex ratio of children born tabulated into tables. The data was analyzed by using analysis of variance (ANOVA) one way pattern followed by the multiple test Duncan. The results showed that the conception rate and birth sex ratio of male born had significantly different (P0,05). The segregation of sperm which swim up increased the conception rate and birth sex ratio of male born.

scholarly journals Conception Rates of Holstein-Friesian Cows Inseminated Artificially with Reducing Frozen Semen Doses

2016 ◽  
Vol 39 (2) ◽  
pp. 75-81
Author(s):  
A. Anggraeni ◽  
T. Herawati ◽  
L. Praharani ◽  
D. Utami ◽  
A. Argis
Keyword(s):  
Holstein Friesian ◽  
Frozen Semen ◽  
Conception Rates ◽  
Friesian Cows

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

The effect on conception rates of semen diluents containing citrate or phosphate buffer, with all combinations of sulphanilamide, streptomycin and penicillin

1955 ◽  
Vol 46 (1) ◽  
pp. 44-55 ◽  
Author(s):  
R. C. Campbell ◽  
J. Edwards
Keyword(s):  
Artificial Insemination ◽  
Phosphate Buffer ◽  
Conception Rate ◽  
Factorial Experiment ◽  
Citrate Buffer ◽  
Conception Rates

1. A 24 factorial experiment involving 68,713 first inseminations was carried out at four artificial insemination centres, to compare semen diluents containing citrate or phosphate buffers and all combinations of sulphanilamide, streptomycin and penicillin.2. The analysis of the results was carried out on punched card machines and on an automatic calculator (EDSAC), as well as on bench machines.3. The main results obtained were:(i) Unsupplemented phosphate buffer gave a conception rate 5·5% above that obtained with unsupplemented citrate buffer.(ii) Citrate buffer with sulphanilamide, streptomycin and penicillin gave a conception rate 6·8% above that obtained with unsupplemented citrate buffer; and(iii) Phosphate buffer with penicillin gave a conception rate 9·3% above that obtained with unsupplemented citrate buffer. This effect was not, however, significantly greater than that referred to in (ii).4. Phosphate buffer depressed conception rate when used with sulphanilamide or streptomycin.

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