Abstract

A prebreeding examination should be performed on animals of both sexes to ensure their optimal health at the time of breeding. At this time, the medical and reproductive histories should be reviewed to detect potential negative influences upon the reproductive tract. Serologic testing for canine brucellosis should be performed to detect and remove infected animals from the breeding program. Examination of the female reproductive tract may be limited to the caudal vagina, vestibule, and vulva. Defects that cause pain and reluctance to breed may be detected with thorough digital and visual inspection. The male reproductive tract can be examined along nearly its entire length without special techniques. Semen may be collected for initial evaluation of testicular function and fertility. Swelling of the vulva and a hemorrhagic vaginal discharge will alert the observant owner to the onset of proestrus. Vaginal cytology may be examined every few days after the observed onset of proestrus to determine the onset of estrus. Breeding should be performed by natural or artificial insemination every 2 to 4 days during estrus to achieve optimal conception rates. The bitch should not be exhibited or trained during the period of potential pregnancy. Unnecessary drugs should not be administered. A diagnosis of pregnancy may be made by abdominal palpation 28 to 30 days after the last breeding. Serum progesterone levels may be measured if pregnancy is not established to determine if ovulation occurred and if sufficient levels of progesterone are present to maintain pregnancy. Optimal breeding management techniques can often result in the maximum reproductive efficiency desired.

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