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In 1986, in the German Democratic Republic, 404 106 ewes were inseminated, representing 62.5% of the total population vs. 356 821 ewes, representing 55.0% of the total, in 1980. The CR was 62.5% in 1986 vs. 60.4% in 1980. Research on the effects of semen diluents, duration of semen storage, semen...

Peter, W.; Nehring, H.; Ueckert, H.
Tierzucht, 1988, 42, 7, pp 316-319

Problems involved in the freezing and thawing of boar semen and the timing of insemination are discussed with reference to the literature and the authors' own work. Because of disappointing CRs and litter sizes compared with those when using fresh semen, only restricted use of frozen semen is...

Peter, W.; Kunze, C.
Tierärztliche Umschau, 1985, 40, 9, pp 701-703