First, estrus identification Donkeys have a long estrus period. Therefore, in order to ensure proper timing of breeding and reduce the number of breedings, and to improve the conception rate of the female donkey, estrus and ovulation tests must be performed. Methods of estrus identification External observations, trials, vaginal examinations, and rectal exams. Frequent rectal examinations are usually based on external observations. Second, the same period of heat The method of simultaneous treatment of the estrus cycle is called simultaneous estrus or synchronous estrus. At the same time, estrus technology mainly uses hormone drugs to change the regularity of the natural estrus cycle, so that the process of adjusting the estrus cycle is unified, so that the group's female donkey concentrates on estrus and ovulation within a specified time. Third, artificial insemination Artificial insemination procedures include rectal examination, sperm collection, seminal dilution, and insemination. The entire job requires the skilled technicians to be skilled in operation, to be strictly disinfected, to operate carefully, and to accurately configure the diluent and the chemical solution. Four, natural mating In natural mating, the male donkey close to the estrus ass, produce sexual impulses, appear courtship, erect reflex, climb across the female donkey, the penis into the female donkey vaginal twitch several times, ejaculation in about 0.8 minutes, individual asses up to 1 Minutes or more. Mating time is generally 1 to 1.5 minutes. The estrous female donkey cervix is ​​open and in estrus, the cervical canal can hold 2 to 3 fingers. The male donkey's penis was fully erected, the enlarged glans pushed toward the vaginal dome, and the urethral projection was inserted into the cervix. The twitching of the penis produces a negative pressure on the cervix, and semen is absorbed into the cervix or uterus during ejaculation. Due to the long estrus of the female donkey, it is more difficult to grasp the breeding time, but the time that the male donkey's sperm maintains fertilization within the female donkey's genitals is as long as 3 to 5 days. Therefore, taking the alternate breeding on the next day does not affect the female donkey's fertility rate. V. Pregnancy diagnosis Pregnancy tests for donkeys should be performed for about 18 days after insemination, and the first pregnancy test should be conducted to prevent miscarriage of empty sham estrus. Pregnancy tests often use external observation, vaginal examination, rectal examination and other three methods. 1 External inspection. That is, by visually observing the external performance of the female donkey in the judgment of pregnancy. 2 vaginal examination. That is, judging whether or not the pregnancy occurs by examining the vaginal mucosa and the cervix. 3 Rectal examination. As with the estrus appraisal, pregnancy is checked by rectal examination of the ovaries and uterus. Adult pull-ups are a type of absorbent underwear designed for adults who
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Donkey breeding technology