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Semen from 9 boars at the Neustadt/Aisch AI Centre was frozen by the method of Westendorf, Richter and Treu [see ABA 44, 753] in Hulsenberg straws. Of 73 sows inseminated under farm conditions, 44 farrowed, with an av. litter size of 9.0. Some pilot laboratory experiments were also carried out. The ...

Schrader, R.; Treu, H.; Hahn, R.
Deutsche Tierarztliche Wochenschrift, 1977, 84, 1, pp 9-12