Contraceptives for Dogs and Cats
The widespread adoption of contraceptives by women and their high degree of efficacy has stimulated great interest in applying these techniques to controlling reproduction in pets.
One of the problems with this approach is that dogs are not women, and tend to be signficantly more sensitive to adverse effects of steroidal contraceptives. Nonetheless, contraceptive drugs have some utility in pet population control.
Several steroidal contraceptives similar to those used in women have been evaluated in dogs and, to a lesser extent, cats. Many of these treatments are quite effective in preventing conception. The problem is that they also carry a high risk of inducing serious uterine disease in treated bitches, most prominently pyometra (pus-filled uterus). In the United States, two steroidal contraceptives are currently available for dogs:
There are several important factors to consider before treating a bitch with either megestrol or mibolerone - check the product literature or with your veterinarian first. Neither drug is approved for use in cats.
Long-acting or depot preparations of progestins such as medroxyprogesterone acetate (Depo-Provera) have been widely used in Europe as contraceptives in bitches. Although effective, there is a clear increase in risk of inducing uterine disease associated with these treatments.
Physical Methods for Contraception
Intrauterine devices are not applicable for dogs and cats due to the extreme difficult of passing anything through the cervix. Plastic intravaginal devices, to prevent penetration by the male, were once marketed for contraceptive purposes in bitches, but were poorly retained and of low efficacy.
|Index of: Animal Population Control|
|Nonsurgical Sterilization of Dogs and Cats||Introduction and Index|
Last updated on May 18, 2000
|Author: R. Bowen|
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