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Abstract

Semen doses packaged in French ministraws were thawed for 8 or 25 s in warm water (38 plus or minus 2 deg C). Over a 12-month period, 43 inseminators carried out 87 486 first inseminations. The NR rate was significantly affected by month of insemination, district, inseminator within district,...

Author(s)
Kupferschmied, H.; Gaillard, C.
Citation
Schweizer Archiv fur Tierheilkunde, 1981, 123, 10, pp 515-522
Abstract

In July 1968, cattle AI in Switzerland went over exclusively to the use of deep-frozen semen. The method of semen collection and preservation is briefly described and illustrated. Current NR rates are higher than at the time when fresh semen was used, and average 69-70%. In the 2nd half of the...

Author(s)
Kupferschmied, H.
Citation
Mitteilungen des Schweizerischen Verbandes fur Kunstliche Besamung und der Schweizerischen Arbeitsgemeinschaft fur Kunstliche Besamung, 1978, 16, 5, pp 167-169
Abstract

The non-return rate to 4000 inseminations carried out at Neuenburg A1 station in 1971 with frozen semen in 0.25 ml straws was 69.4 per cent. v 69.9 to 4000 inseminations with 0.5 ml straws. In view of the small, non-significant difference in conception ratio between the two types of straw, it was...

Author(s)
Kupferschmied, H.
Publisher
Hanover-Waldhausen., German Federal Republic
Citation
Tierzuchter, 1973, 25, 5, pp 242-244