Influence of sperm number per insemination on fertility of bull frozen semen
1995
Manit Chanitawong | Surachit Thongsodsaeng | Soonthorn Sunathai (Artificial Insemination Research Center, Khon Kaen (Thailand))
Study of three concentrations of frozen bull semen used in artificial insemination per one conception rate in three groups each of 100 American Brahman cows of first to second calving was conducted in small holders condition from 15 farms in Khon Khaen province. After 3 months of insemination, sperm concentrations of 10, 20 and 30 millions spermatozoa per dose (0.25 ml), revealed conception rates of 50 percent, 60 percent and 63 percent respectively. From statistical analysis, it was shown that the conception rates of the second and third groups were significantly higher than that of first group while those of second group and third group was not significantly different. The sperm concentration of 20 millions spermatozoa per dose gave the high conception rate, and production cost was lower than that of 30 millions spermatozoa per dose.
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