[The most suitable time for mating of the bitch (author's transl)]

The literature on the oestrous cycle in the bitch is briefly reviewed. 283 bitches were studied in order to develop a procedure by which to determine the time of ovulation, i.e., the optimum time for mating or insemination. Examination of vaginal smears, clinical observations of the bitch and sugar tests of the vaginal discharge showed that the sugar test is the most satisfactory method in dog-breeding and, particularly, that it is simple to use. The mean conception rate of the bitches which were inseminated was 71 per cent.