What is the artificial insemination technology of the first sow?

When sows are artificially inseminated for the first time, one hand holds the vas deferens, the other hand separates the labia and inserts the vas deferens into the vagina. When you feel resistance, apply a little force, and then put the top solid on the second and third layers of the cervix. Take out semen, insert it into the tail of semen, and start insemination. After transplantation, fold the tail of the vas deferens, insert it into the vasectomy bottle, and let it slide slowly to avoid sperm. ① The key factor of successful artificial insemination: 1. Choose a patient, caring and responsible breeder; 2. Continuous analysis results (breakage rate, delivery rate, litter size, deformity rate, etc.). ) to improve production performance; Select experts with rich practical experience (note: non-experts) to train employees; High-quality (patient, careful and responsible, not necessarily highly educated) pig breeder (practice shows that even technical secondary school students who have just graduated but have not raised pigs can complete artificial insemination in one step without gradual transition (especially in new pig farms); 5. Correct and meticulous operation during artificial insemination.

① In order to master the oestrus performance of sows, artificial insemination was carried out after the oestrus time was determined. Generally, 20-30 hours after sow estrus is appropriate. Standardize the artificial insemination operation. Sterilize the vulva first, and then insert it upward into the vagina at an angle of 30-45 degrees. When the cervix locks the vas deferens, connect the top of the plastic bottle containing semen to the vas deferens, so that the semen can be discharged slowly.

Experienced breeders will choose to leave the vas deferens in the sow's vagina for a period of time after killing pigs to prevent semen from flowing back. However, in order to prevent backflow, some breeders will leave the vas deferens in the sow's vagina for a quarter of an hour or even half an hour, thinking that this is better. In fact, if you stay in the sow for a long time, you will feel a foreign body, and the sow will be angry and responsible. On the contrary, it will lead to the decline of the efficacy of vas deferens. In severe cases, it may destroy the delivery channel of sows and lead to vaginitis. In addition, it is a long time late in the trough delivery channel.