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Luteolysis in early diestrous beagle bitches
E E Oettle1, H J Bertschinger, A E Botha
1Department of Theriogenology, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Republic of South Africa.
Theriogenology
|January 1, 1988
Summary
Prostaglandin F2alpha effectively induced luteolysis in beagles during early diestrus, preventing pregnancy. Adding bromocryptine or dexamethasone did not enhance this luteolytic effect.
Area of Science:
- Reproductive Endocrinology
- Canine Reproduction
Background:
- Luteolysis is crucial for regulating the reproductive cycle.
- Early induction of luteolysis can prevent unwanted pregnancy in canines.
Purpose of the Study:
- To investigate the efficacy of prostaglandin F2alpha (PG) in inducing early luteolysis in diestrus beagles.
- To determine if bromocryptine or dexamethasone influence PG-induced luteolysis.
Main Methods:
- 15 mated beagles were treated with prostaglandin F2alpha (PG) subcutaneously for 4 days.
- Groups received PG alone, PG with bromocryptine, or PG with dexamethasone.
- Untreated beagles served as controls.
Main Results:
- 80% of treated beagles (4/5 per group) experienced complete luteolysis and did not whelp.
- The three beagles that did not undergo luteolysis whelped normally.
- No significant difference in luteolysis was observed between PG-only and combination therapy groups.
Conclusions:
- Early diestrus luteolysis is achievable in beagles using prostaglandin F2alpha.
- Bromocryptine and dexamethasone do not appear to augment the luteolytic effect of prostaglandin F2alpha in this model.
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