Die Anwendung der Gestagene in Veterinärmedizin und Zootechnik

Jöchle, W.

doi:10.1007/978-3-662-00826-3_4

Cited by 7 publications

(4 citation statements)

References 234 publications

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“…Additional oestrogen (estradiol valerate or mestranol) or gonadotrophine (HCG) treatment were without convincing effects, confirming tendencies Cycle synchronization in cattle in Tanzania 389 reviewed earlier (Jochle, 1969). The HCG-treatment results also indicate that the two inseminations during the first synchronization period might be wasted.…”

Section: Discussionmentioning

confidence: 58%

Oestrous cycle synchronization and oestrus induction in indigenous and European cattle in Tanzania

Schmidt¹,

Jöchle²,

Smidt³

1973

J. Agric. Sci.

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SUMMARYFrom 1969 to 1971, 743 animals (indigenous Zebu and European dairy cattle, lactating or dry cows and heifers) received oestrous cycle synchronization treatments at government-owned and private ranches and farms in the Tanzanian highlands (West Kilimanjaro); 445 matching animals served as controls. Treatment schedules consisted of chlormadinone acetate (CAP) given daily for 14 days (10 mg/day) orally; or a single CAP injection (50 mg) followed by 4 or 5 days of oral treatment (10 mg/day) 9–12 or 11–15 days later. In addition, some groups received either estradiol valerate (5 mg) together with the CAP injection, or 10 mg/day mestranol from day 11 to 15, together with CAP; one treatment group received 1000 i.u. of HCG after the last CAP medication and were inseminated 12 and 24 h thereafter. Animals were either inseminated or bred naturally. With all treatment schedules, good synchronization, unimpaired fertility and consistently a significant reduction of anoestrus was achieved. Oestrogen treatments had no effects; treatment with 1000 i.u. of HCG was unsuccessful. Management factors, food supply and phase of reproductive life had significant impacts on treatment success and fertility. Synchronization can be used successfully under a wide range of management conditions to unfold existing potentials of artificial insemination in Bos indicus and Bos taurus in the tropics.

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Section: Discussionmentioning

confidence: 58%

Oestrous cycle synchronization and oestrus induction in indigenous and European cattle in Tanzania

Schmidt¹,

Jöchle²,

Smidt³

1973

J. Agric. Sci.

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“…The field studies reported here, with herds of different genetic background and representing different levels of advanced management, were initiated in 1968 and extended through 1969 and 1970. When our experiments were begun, there was no published information on synchronization of oestrus in Zebu cattle. Data on synchronization, using various progestins and different routes of application, were reported only from B. taurua (European Beef and Dairy Breed) of the moderate climate belts of the Northern and Southern hemisphere (Jochle, 1969a).…”

Section: Introductionmentioning

confidence: 99%

“…The aim of our studies was to determine the effect of the progestin Chlormadinono acetate (CAP) on B. indicus for synchronization of the oestrous cycle. Substantial information was available on the synchronizing effect of this compound in B. taurus (Jochle, 1969a;Schmidt, Smidt & Jochle, 1970;Schmidt, Huber, Giinzler, Jochle & Smidt, 1970;Kordts, 1970;Giinzler & Geisler, 1970;Grunert, Frerking & Herrler, 1971).…”

Section: Introductionmentioning

confidence: 99%

“…Under ranch conditions, every day of confinement has undesirable implications; therefore, the reduction of the total treatment period from the 18 days recommended for B. taurus (Jochle, 1969a) to 14 days was studied before the field trials reported here commenced. Own, unpublished, information did not reveal any significant differences in synchronization and fertility between 14-and 18-day treatment schedules.…”

Section: Introductionmentioning

confidence: 99%

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Oestrous cycle synchronization in Zebu cattle and its use in cattle production and management in the tropics

Jöchle¹,

Hidalgo²,

Giménez³

et al. 1973

J. Agric. Sci.

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SummaryBetween March and August 1968 to 1970, Chlormadinone acetate (CAP), 10 mg/head/ day, was administered to 668 Zebu cows and heifers for oestrous cycle synchronization for 14, 12, or 9 days, the latter schedule supported by an injection of 5 mg estradiol valerate on day 2 to achieve luteolysis. Applied orally over a period of 14 days, CAP provided a reliable method for cycle synchronization. The severe anoestrous rate experienced in all herds reduced the overall percentage of synchronized animals. Fertility from insemination during the first synchronization period (day 2 to 10 after treatment) was slightly, yet insignificantly reduced, but was completely restored during the second synchronization period (day 20–30). Insemination only during this second synchronization period resulted in conception and pregnancy rates similar to those combined from the first and second synchronization period.Of factors tested for influencing synchronization and fertility, presence or absence of penis-deviated teaser bulls (psycho-stimulation) had no effect on the percentage of animals synchronized, or on post-treatment fertility. In well-managed herds, the percentage of animals responding to treatment was predetermined by the number of animals already cycling, reflecting their phase of reproductive life. Levels of management had an important impact on the success of cycle synchronization combined with artificial insemination. Both methods are managerial tools for improvement of already good management. Their failure under insufficient management conditions has diagnostic value.Possibilities and limits shown for oestrous cycle synchronization in Zebu cattle were similar to those reported in European cattle. Within these limits, CAP can be employed successfully as a means for cycle synchronization, providing sufficient synchronization and acceptable fertility and allowing economical use of artificial insemination.

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The treatment of noncycling mares by oral application of chlormadinone acetate (CAP)

Hoppe¹,

Bienkowski²,

Lipczynski³

1974

Theriogenology

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Die Anwendung der Gestagene in Veterinärmedizin und Zootechnik

Cited by 7 publications

References 234 publications

Oestrous cycle synchronization and oestrus induction in indigenous and European cattle in Tanzania

Oestrous cycle synchronization and oestrus induction in indigenous and European cattle in Tanzania

Oestrous cycle synchronization in Zebu cattle and its use in cattle production and management in the tropics

The treatment of noncycling mares by oral application of chlormadinone acetate (CAP)

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