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Abstract

20 cows were inseminated and received a 7-day embryo in the uterine horn contralateral to the ovulating ovary 4-8 days after insemination. 16 of the cows conceived, and of these, 44% were pregnant with twins. For the cows pregnant with a single calf, 62.5% of the pregnancies resulted from the ...

Author(s)
Bach, S.; Kähn, W.; Müller, F.; Schulz, J.; Geigenmüller, S.
Citation
Tierärztliche Praxis, 1991, 19, 4, pp 365-368
Abstract

Translated titles of the 20 papers presented at this meeting are: Organization of breeding hygiene work in state veterinary services [in German Democratic Republic], by E. Osang; Organization of breeding hygiene work in Hungary, by P. Soós; Characteristics of post-partum anoestrus in dairy cows in...

Citation
Tierhygiene-Information, 1984, 16, Sonderheft, pp 234pp.
Abstract

Translated titles of relevant papers presented at this meeting are: Status of knowledge on aetiology of embryonic mortality in cattle, by J. Schulz and K. Eulenberger; Analysis of the prevalence of embryonic mortality in a herd of heifers, by P. Wolf et al.; Prevalence of embryonic mortality in...

Citation
Tierhygiene-Information, 1983, 15, Sonderheft, pp 207pp.
Abstract

Data were obtained over 18 months from 72 000 first inseminations by 155 AI boars, and from the examination of 6543 ejaculates. The occurrence of different types of abnormal spermatozoa is tabulated. The mean value for all abnormal spermatozoa was 15 plus or minus 12%. 'Pathological' abnormalities...

Author(s)
Bach, S.; Neundorf, P.; Stemmler, K.-H.; Mudra, K.; Ueckert, H.
Citation
Monatshefte fur Veterinarmedizin, 1982, 37, 12, pp 463-467
Abstract

From examination of 6543 ejaculates from 155 boars used for artificial insemination (and each having inseminated about 465 gilts and sows), the proportion of abnormal spermatozoa was calculated, and also the conception rates associated with different proportions of abnormal spermatozoa. 3176 (62%)...

Author(s)
Stemmler, K.-H.; Bach, S.; Neundorf, P.; Mudra, K.; Ueckert, H.
Citation
Monatshefte fur Veterinarmedizin, 1982, 37, 12, pp 467-470
Abstract

For 639, 368 and 131 inseminations of females showing strong, moderate or weak signs of oestrus, the CR was 67.6, 69.0 and 61.8% resp. For 131, 142, 147, 356, 102, 108 and 160 females inseminated 0-4, 4-8, 8-12, 12-16, 16-20, 20-24 and 24 h after observation of oestrus resp., the CR was 46.6, 72.5, ...

Author(s)
Bach, S.; Sachsenroder, H.
Citation
Tagungsbericht der Akademie der Landwirtschaftswissenschaften der Deutschen Demokratischen Republik, 1981, No. 192, pp 99-106
Abstract

A discussion which includes consideration of the necessity of examining sires for semen quality and mating behaviour. References are to work on cattle, sheep and pigs.

Author(s)
Haase, H.; Bach, S.
Citation
Monatshefte fur Veterinarmedizin, 1979, 34, 12, pp 457-461
Abstract

Data collected on 13 753 reproductive cycles of 6312 cows in 5 herds were analysed. With increasing intervals between parturition and insemination, the CR increased from 52.2% for an interval of less than or equal to 29 days to 72.7% for an interval of 40-49 days, reaching a max. of 76.0% for an...

Author(s)
Bach, S.; Stemmler, K.-H.
Citation
Monatshefte fur Veterinarmedizin, 1978, 33, 3, pp 81-85
Abstract

Semen samples from 932 potential AI bulls were examined on 2 occasions. On average, the proportion of morphologically abnormal spermatozoa at the 1st and 2nd examinations was 16.5 and 15.4%, and the proportion of bulls with more than or equal to 20% abnormal spermatozoa was 22 and 18%. When the 134 ...

Author(s)
Haase, H.; Bach, S.; Stemmler, K.-H.; Muller, F.
Citation
Monatshefte fur Veterinarmedizin, 1977, 32, 12, pp 941-944
Abstract

Data on 5256 cows in 17 herds were analysed. The CR to 1st insemination averaged 35.2, 49.5, 58.2, 63.3, 53.8, 60.5, 61.0 and 57.8% resp. for cows inseminated <29, 30-39, 40-49, 50-59, 60-69, 70-79, 80-89 and >90 days after calving. The corresponding CRs for 967 cows in 16 herds with an unsatisfactory reproductive record were 27.3, 36.0, 50.0,...

Author(s)
Bach, S.; Stemmler, K. H.; Gunther, R.; Rudert, W.
Citation
Tierzucht, 1974, 28, 11, pp 488-490

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