Methods for determining the timing of breeding in dogs

Abstract

This review presents various techniques of definitions optimum time of insemination. We have considered the principle of work, pluses and minuses of such methods as vaginal cytology, definition of concentration of progesterone, use the Dog detector ovulation, ultrasonography of ovaries, vaginal endoscopy, a research of cervical and vaginal secrets, saliva crystallization. The vaginal cytology is a fast method of diagnostics with high precision based on studying of the tearing-away cages of a vaginal epithelium and changes of its structure depending on changes in ovaries. The microscope, a wadded tampon, subject glass, a set of dyes is necessary for carrying out a research. Definition of concentration of progesterone in blood is carried out after the first signs of a proestrus each 2-3 days. This method allows to reveal the increase of concentration before an ovulation and to plan the date of insemination. The Dog Detector Ovulation can be used at home, it allows to define the fertile period. Ultrasonography of ovaries allows to define the dog ovulation. In addition, several studies demonstrated that ultrasound images of the ovaries around ovulation are more difficult to analyze, due to the fact that ovarian follicles do not differ much in the immediate pre- and postovulatory period. Vaginal endoscopy demands the expensive equipment and frequent usage of sedative medicines. This research estimates the morphological changes in the vaginal mucosa under the influence of estrogen and progesterone and defines a stage of a sexual cycle and optimum time for insemination. The technique of a research of secrets is based on change of the picture when drying during the fertile period. This method is simple in use, but has low efficiency. The definition of dog fertile period is relevant for owners and for practicing veterinarians