Factors Influencing Conception Rate in Cows

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Factors Influencing Conception Rate in Bovines:

Factors Influencing Conception Rate in Bovines P. Venu Madhav M.V.Sc Regional Animal Husbandry Training Centre, Visakhapatnam

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Calving Conditions Failure to provide clean environment (or) failure to practice good hygiene at calving contributes to retained placentas & reproductive tract infections and can lower conception rates 2 Regional Animal Husbandry Training Centre, Visakhapatnam

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Post-calving Health the key to maximizing conception rates must lie in the prevention of disorders, not treatment after they have occurred 3 Regional Animal Husbandry Training Centre, Visakhapatnam

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Estrous Detection Errors can result in poorly timed insemination and low conception rates 4 Regional Animal Husbandry Training Centre, Visakhapatnam

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Timing of Service cows should be bred at a time that will ensure that healthy, living sperm are present at the site of fertilization when the unfertilized egg arrives (standing heat) 5 Regional Animal Husbandry Training Centre, Visakhapatnam

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Quality of semen Semen quality at the time of breeding is dependent on the quality of semen at the time it was purchased, storage, thawing procedures and handling techniques 6 Regional Animal Husbandry Training Centre, Visakhapatnam

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Insemination Technique Faulty insemination technique is a major factor causing low conception rate in many herds. Correct semen placement is critical. 7 Regional Animal Husbandry Training Centre, Visakhapatnam

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Bull Fertility Inseminator skill and timing of the insemination may complicate the picture 8 Regional Animal Husbandry Training Centre, Visakhapatnam

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Level of Milk Production and Nutrition the higher producing cows in a herd have lower conception rates. Good nutrition & management compensate any negative effect of high milk production 9

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Interval from Calving to Breeding Conception rates are reduced in cows bred before 50 days after calving. Conception rates increase slightly, (but only slightly) after 50 days 10 Regional Animal Husbandry Training Centre, Visakhapatnam

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Age Conception rate is generally lower in older cows. Conception rate remained constant (50%) during the first 3 lactations. Conception rates were 10% higher in virgin heifers and 10% lower in 4th lactation and older cows. 11 Regional Animal Husbandry Training Centre, Visakhapatnam

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Genetics Extensive research has confirmed that reproductive traits have very low heritability 12 Regional Animal Husbandry Training Centre, Visakhapatnam Regional Animal Husbandry Training Centre, Visakhapatnam

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Environment Low conception rates are observed when temperatures and humidity are high. Heat stress on the day of breeding and the day After causes fertilization failure or damage to the embryo 13 Regional Animal Husbandry Training Centre, Visakhapatnam

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Presence of calf Low conception rates are observed due to presence of the calf. Mechanism unknown but both the physical contact of the calf (nursing) and the mere presence of the calf at side delay estrus. . 14 Regional Animal Husbandry Training Centre, Visakhapatnam

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Nutritional imbalances Mineral imbalances High S, Fe, Mo Low Cu, Se, Mn, Zn, P Protein excess High legumes in pastures that increases CP to > 22-23% reduces CR 15 Regional Animal Husbandry Training Centre, Visakhapatnam

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Disposition Hormones released during stress reduces conception 16 Regional Animal Husbandry Training Centre, Visakhapatnam

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Summary Reproductive success or failure is governed by the interaction of the length of the anestrous period and the conception rate of the female. Proper management will help reduce the risk of reproductive failure 17 Regional Animal Husbandry Training Centre, Visakhapatnam

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Questions ? ? ? ? ? 18 Regional Animal Husbandry Training Centre, Visakhapatnam

Thank you:

Thank you Venu Madhav Regional Animal Husbandry Training Centre, Visakhapatnam

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