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Artificial dog mating has not yet been done successfully in many instances. However, we believe that as further experimentation is done, artificial dog mating will be a common practice in the future.
First, we may mention artificial mechanical mating. The semen of the male dog is taken and one emission placed in one or more gelatin capsules, or in a syringe, the semen is forced into the womb through the syringe. This method enables as many as three female dogs to be served in one day. However, this method has not yet been greatly successful. The injection should be made when the mating cycle is well on its way, perhaps the sixteenth day.
The recent discoveries have concerned themselves mostly with injecting chemicals into the dog’s blood to begin or to stop the bitch’s heat. Ovaries are glands and from them hormones can be extracted, especially at packing plants, and prepared for use.
The follicular hormone tends to bring on the mating cycle. If it can be perfected, it would enable a dog breeder to have as many bitches as he pleases in heat at about the same time enabling him to breed quickly to a special stud, and to have all the puppies for the year whelped and weaned together.
The luteal hormone, secreted by the luteal bodies, tends to postpone the heat or mating cycle. It is injected when a female dog is about to come into heat. A natural absence of it usually causes abortion in early pregnancy.
Hormone are chemically uniform almost all animals. That from one animal may be injected into another animal, for instance, a cow’s hormones into a human. Yohimbine, at present much used to induce heat in a female dog, is not recommended. Hormones injected hypodermically appear to give better results than those fed through the dog’s mouth.
Excerpted from Dog World magazine, August 1930, Vol. 1, No. 12. For back issues of Dog World, click here.