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Induction of oestrus in ewes using a controlled internal drug release device and PMSG

Published online by Cambridge University Press:  27 March 2009

W. M. C. Maxwell  and
D. R. Barnes
W. M. C. Maxwell
Affiliation:
Animal Breeding and Research Institute, Katanning, W.A., Australia
D. R. Barnes
Affiliation:
Ruakura Animal Research Station, Hamilton, New Zealand
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Extract

A number of methods have been developed for synchronization of oestrus in sheep (reviewed by Maxwell, 1984), but the most successful have been based on the suppression of the oestrous cycle by treatment with a polyurethane progestagenimpregnated intravaginal sponge (Robinson, 1965). A precise synchronization of oestrus and ovulation for artificial insemination (A.I.) is obtained following a 12- to 14-day treatment with the intravaginal sponge and an injection of pregnant mares serum gonadotrophin (PMSG) at sponge removal (Robinson & Smith, 1967). This allows a single fixed time A.I. to be performed on all ewes without the need for detection of oestrus.

Type
Short Note
Information
The Journal of Agricultural Science , Volume 106 , Issue 1 , February 1986 , pp. 201 - 203
Copyright
Copyright © Cambridge University Press 1986

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References

REFERENCES

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