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Dairy cattle reproductive management
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Artificial insemination is a powerful tool for genetic improvement that enhances the value of bred heifers. A longer duration of estrus and more mounting activity makes the detection of estrus in heifers easier than in lactating cows, thus heifers are generally more sexually active than cows and easier to catch in estrus.
For optimum fertility, heifers should have three or more estrous cycles before the breeding season begins. If the goal is to average 24 months of age at first...
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The 27th annual European AI Vet meeting will take place in Salzburg, Austria on October 27th and 28th, and will count with David Kenny as one of the speakers.
Kenny, who is the Principal Research Scientist in Ruminant Nutritional Physiology at Teagasc, will be giving a...
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Achieving high conception rate is one of the conditions for achieving efficient production of milk at farm level. For many years the Israeli dairy industry suffered, like other farms in warm areas, a significant decline in the ability to pregnant the cows during summer months, causing seasonality in milk production throughout the year, and hence, to a seasonality of milk supply to the industry and market. ...
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Introduction Dairy farm profitability depends on a herd’s reproductive performance, but this relationship is complex. Farmers and consultants can easily assess reproductive performance by benchmarking pregnancy rate (i.e., 21-d pregnancy rate) or other reproductive metrics, but they find it difficult to measure the economic impact (e.g., profitability) of changes in reproductive outcomes, alternative reproductive...
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INTRODUCTION The three largest expenses of the dairy business are: 1) feeding lactating dairy cows, 2) raising replacement heifers, and 3) labor. Reproductive performance of lactating dairy cows directly influences the annual frequency of calving (which affects the number of replacement heifers available) and milk yield (due to extended low productivity lactation and dry period). Many...
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Dr. Richard Laven (Massey University) discussed his findings on the evaluation of prevalence and the impact of environment, during the International Conference Lameness in Ruminants 2015 in Valdivia, Chile....
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Introduction The clinical endometritis of dairy cows influences the reproductive performance and causes economic losses (Leblanc et al 2006, Azawi 2008). Also, it causes the reduction of the body condition of dairy cows, which in turn suppresses fertility (Runciman et al 2008). It has been determined that it has the prevalence ranging from 5.0 to >30% affecting about 20.0% of lactating dairy cows (Leblanc et al 2002,...
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Do Lupins increase the oestrogen levels directly or do the ovaries appear more active due to the protein increase
Thankyou...
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Bioavailability of rumen-protected methionine: Mepron® contains the highest metabolizable methionine content among commercially available products
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Introduction Fertility of dairy cow is reduced in last few decades with increased productivity. Reduced fertility may limit the profitability and sustainability of dairy farms. Fertility is a multi-factorial trait and it is affected by number of factors viz. genetic, environmental, dietary and management factors with their complex interactions which makes difficult to determine the exact reason. Stress could be one...
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Reproduction performance in lactating dairy cows is frequently not ideal and tends to fluctuate throughout the year due to many different factors, but particularly heat stress. In herds in which cows undergo sustained heat stress periods, the number of pregnancies that can be generated in the lactating animals in a weekly basis is dramatically reduced during warmer months. The figure below represents the fluctuation in conception in a large dairy herd in...
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Introduction Currently, reproductive failure is the first reason for involuntary culling, which stresses the economic importance of improving fertility. Estrous synchronization programs have been researched extensively since the mid 1990’s (Pursley et al. 1995; Moreira et al., 2001; Dewey at al., 2010) with the main objective of improving artificial insemination (AI) submission rate, decrease intervals between AI,...
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Dr. David Hawkins, Director of Franklin Vets, was invited by Proleche to give a talk in Cordoba, Argentina about Progesterone based synchrony programmes in cattle. He also shares the experience in New Zealand. ...
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Robert P. Wettemann, Regents Professor at Oklahoma State University, speaks about how to improve pregnancy rates of cows and how can nutrition regulate reproduction....
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Distinguished Professor & L.E. "Red" Larson Professor of the University of Florida, Peter Hansen, was invited to the X International Symposium of Animal Reproduction to speak about Genetic, nutritional and pharmacological approaches to improve fertility during heat stress....
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Optimized systems for timed artificial insemination (TAI; Pregnancy per AI of 40 to 50%) entail controlling the period of follicle dominance, need to sustain progesterone exposure throughout the period of ovulatory follicle development, induction of complete luteolysis in lactating dairy cows, and finally the need to optimize timing of AI relative to induction of ovulation. Nevertheless, factors such as anovulation,...
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Introduction Herd bulls have a large influence on many aspects of beef operations, especially an operation's profitability. For example, percent calf crop weaned is the single most important factor influencing profitability, and the number of cows bred during the breeding season plays the largest role in percent calf crop weaned. Therefore, an operation's profitability is directly tied to the herd bull's breeding capability. In addition, herd...
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Bioavailability of rumen-protected methionine: Mepron® contains the highest metabolizable methionine content among commercially available products
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Introduction
Post partum period is the most crucial transitory phase in bovine life when various physiological, gynaecological, biochemical changes occur. During this period the cattle is exposed to high risk of infection to uterus as the anatomical barriers are breached and genitilia remains open for various days (Goff and Horst, 1997). Post parturient retention of foetal membranes & gynaecological...
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INTRODUCTION Buffalo is a major dairy animal in Pakistan with the total population of 28.4 million, 64%, 27%, 7%, 3% in Punjab, Sindh, North West Frontier and Balochistan provinces respectively and 0.487 million in Azad Jammu and Kashmir (DOP, 2006). About 67.5% milk is produced by buffaloes, 30% by cattle and only 2 to 3% by goats and other species (Anonymous, 2006). Buffaloes and cattle are kept in different parts of the country under different...
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INTRODUCTION Livestock plays an important role in the economy of Pakistan. This sector contributed approximately 53.2 percent of the agriculture value added and 11.4 percent to national GDP during 2009-10. Gross value addition of livestock at current cost factor has increased form Rs. 1304.6 billion (2008-09) to Rs. 1537.5 billion (2009-10) showing an increase of 17.8 % (Economic survey of Pakistan 2009-10). In spite of the...
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Role of vitamin e and selenium in anestrous and conception " Fertility is a luxurious event For this, endometrium should be protected by antioxidant Antioxidant can be given as nutrient Vitamin E and Selenium can be given for this event Let fed this nutrients in this moment " With this quote let me start as...
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