In order to improve the conception rate of artificial insemination, the following key technologies should be implemented:
(1) Selection of rams and identification of semen quality In order to increase the rate of seizures, rams with reproductive defects should be eliminated as soon as they are discovered. Any form of testis, cryptorchidism or testicles cannot be selected as a ram. Temporary infertility should also be avoided in some rams. For example, if the rams are temporarily transported after long-distance transportation, they will have temporary infertility. In the summer and autumn, when the temperature is too high, the ram’s libido will weaken and the semen quality will decline, which can also cause temporary sterility. . Through semen quality testing, according to the sperm motility, the percentage of normal sperm, sperm density, etc. to determine whether the ram can participate in breeding.
(2) Identification of ewes in ewes and timely insemination It is very important to determine estrus estrus identification techniques to determine the timing of timely insemination. The best time for artificial insemination of sheep is between 18 and 24 hours after estrus. Because the cervix is ​​opened at this time, it is easy to infuse the cervix. Generally can be based on the outflow of mucus to determine the estrus morning and evening: Mucus is transparent and viscous is the beginning of estrus; the color is white to the middle of estrus; if it has been opaque, cloudy, viscous, that is, to late estrus, is The best time for insemination. However, it is difficult to determine when the ewes normally start. According to the law of late ovulation of ewes, estrus ewes can be selected by two methods of trials, morning and evening. The ewes selected in the morning will lose one sperm in the afternoon and repeat the next one in the morning; the ewes selected in the evening will lose their sperm in the morning and repeat the infusion in the afternoon, which will greatly improve the conception rate.
(3) Strict implementation of artificial insemination Operational procedures Artificial insemination, from sperm collection, semen processing to timely insemination, are all detained in a ring. Any one of these rings will affect the fertility rate. For example, because cleaning and disinfection work is not strict, it will not only affect the matching rate, but may also cause reproductive organ diseases. Therefore, the breeder should strictly abide by the artificial insemination operating procedures and improve the operation quality in order to effectively increase the conception rate.
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