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KMID : 1005220010160010007
Journal of Embryo Transfer
2001 Volume.16 No. 1 p.7 ~ p.14
Studies on Development of Breeding Technique to Increase HanWoo(Bos taurus coreanae) : II. Early Pregnancy Diagnosis Incidence of Reproductive Disorders
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Abstract
The aims of these study were to diagnose early pregnancy and reproductive disorders by using progesterone concentration and ultrasonography. The measurement of blood progesterone (P©þ) concentration was conducted to diagnose pregnancy and to detect corpus luteum (CL) or evaluate disorder of CLs. As a result, the incidence rates of reproductive disorders were as follows : SH and EED (41.9%), inacitve ovaries (32.6%), follicullar cyst (9.3%), PCL (7.0%), endometritis (4.7%), pyometra (2.3%) and luteal cyst (2.3%). 61 Cows having P©þconcentration 1.0 ng/ml(at the insemination) were increased to 1.0 ng/ml ¡Ã 6day after insemination. 50 cows among 61 cows were diagnosed pregnant. 8 cows among 13 HanWoos having P©þconcentration 1.0 ng/ml at the insemination and 1.0 ng/mnl 6 day after insemination had non-ovulatory estrus and the others had P©þconcentration 1.0 ng/ml at the insemination and 1.0 ng/ml ¡Ã 6 day after insemination, which was the error of estrus detection. All 13 cows were diagnosed non-pregnant. 47 cows diagnosed pregnant after insemination of P©þconcentration 3.0 ng/ml were examined by ultrasonography at 30 day post-insemination. As a result, 41 cows were diagnosed pregnant (87.2%) but 14 cows having P©þconcentration 3.0 ng/ml at 21 day after insemination was diagnosed to non-pregnancy. Calving intervals by surveying 100 cows were as follows 11¡­12 months (20%), 12¡­13 months (36%), 13¡­14 months (19%), 14 months ¡Ã (25%), respectively. In conclusion, hormone and ultrasonography help to detect reproductive disorders exactly and diagnose early pregnancy. This study suggest that diagnosis of early pregnancy and reproductive disorder by blood P©þconcentration and ultrasonography improve reproduction management of HanWoo.
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