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Abstract

Oestrus was induced in 611 gilts and 762 sows, and insemination took place twice in 1 day on display of the standing reflex in the presence of a boar. For 315 experimental gilts and 377 sows, 5 IU oxytocin were added to the semen before each insemination. In experimental gilts, the duration of ...

Author(s)
Huhn, U.; Fritzsch, M.; Dahms, R.
Citation
Archiv fur Experimentelle Veterinarmedizin, 1977, 31, 4, pp 561-566
Abstract

Some results are presented, mainly in the form of tables and graphs, on reproductive performance of gilts and sows analysed according to various criteria. These include the effects of age and live weight of gilts at the beginning of synchronisation, lactation length of sows, quality requirements...

Author(s)
Fritzsch, M.; Reuther, E.; Sieland, W.; Bergfeld, J.
Citation
Monatshefte fur Veterinarmedizin, 1973, 28, 18, pp 690-694
Abstract

Author(s)
Fritzsch, M.; Huhn, U.
Citation
Archiv fur Experimentelle Veterinarmedizin, 1977, 31, 4, pp 557-560
Abstract

Two series of experiments were carried out with 2340 gilts on commercial farms. Oestrus was synchronised by feeding 5 g Turisynchron (methallibure) daily for 20 days beginning at about 250 days of age and then injecting 1000 IU PMS followed later by 250 or 500 IU HCG. The effect on fertility of HCG ...

Author(s)
Reuther, E.; Fritzsch, M.; Bergfeld, J.; Sieland, W.
Citation
Monatshefte fur Veterinarmedizin, 1975, 30, 6, pp 217-223
Abstract

Two series of experiments were carried out in 1971 and 1973 with 2032 sows on commercial farms; 24 h after weaning their litters they were given 1250 IU PMS and later 250 or 500 IU HCG. Insemination followed irrespective of whether sows were on heat or not. The effect on fertility of HCG dosage and ...

Author(s)
Reuther, E.; Fritzsch, M.; Bergfeld, J.; Sieland, W.
Citation
Monatshefte fur Veterinarmedizin, 1975, 30, 6, pp 211-216
Abstract

Details are given of the selection criteria used and the percentages of boars culled, from the weaner stage to adult use in AI. For 150 boars in use in 1972, the number of insemination doses produced/ejaculate averaged 10.0, CR to 1st insemination 76.00%, piglets born/litter 9.81, and the...

Author(s)
Fritzsch, M.; Thier, M.
Citation
Tierzucht, 1974, 28, 5, pp 213-217
Abstract

Data are tabulated on the performance of 816 synchronised gilts treated with 1000 IU PMS and inseminated when exhibiting the standing reflex and on 349 gilts with synchronised ovulation (treated with 1000 IU PMS followed by 500 IU HCG 3 days later) and timed insemination (regardless of signs of...

Author(s)
Sieland, W.; Fritzsch, M.; Huhn, U.; Volkel, B.
Citation
Tierzucht, 1975, 29, 6, pp 263-267
Abstract

Since 1970 a method of reproduction control based on heat synchronization developed by the Research Centre, Dummerstorf (DDR) has been used successfully in a large number of agricultural co-operatives. Together with efficient organization of artificial insemination this had led to considerable...

Author(s)
Ahrens, M.; Bergfeld, J.; Brand, E.; Braune, S.; Elze, K.; Fritzsch, M.; Haaker, S.; Huhn, U.
Citation
Monatshefte fur Veterinarmedizin, 1975, 30, 6, pp 208-211