First, it is necessary to correctly master the breeding time: After mating, the sperm can reach the fallopian tube after 2-3 hours of swimming. Sperm can generally survive 10-20 hours in the sow's reproductive tract. Based on this, the appropriate time for breeding is 2-3 hours before sow ovulation, which is about 19-30 hours after oestrus begins. Breeding prematurely, sperm lose fertility. Late in the game, when the sperm reaches the upper end of the fallopian tube, the egg has lost its ability to fertilize. Therefore, in the production practice, the mating should be based on the estrus syndrome and the estrus time. Breeding time: The local sow is in the second day to the third day after the estrus starts; the cultivars are mostly on the second day after the estrus starts, ie, the mucous membrane of the vulva can be changed from bright red to light red; the hybrid sows are mostly in estrus. On the second day of the afternoon or the third day of the morning; in terms of age, the older sows ovulate earlier, and the duration of estrus is short. They should be bred in advance. The young gilts have long estrus, and the ovulation time is relatively late. Three-day breeding is appropriate. Middle-aged sows are generally bred on the second day. They are “older with early, small with late, and not old with smallâ€. In terms of production practice, as long as the sow is allowed to cross the boar, the artificial breeding application can be performed with the hand pressing the sow's buttocks to stay for the first time. In order to ensure successful breeding, it should be performed again after 8-12 hours. Repeated breeding, good results can be obtained, and the success rate of breeding is extremely high. Second, if the sow uterus inflammation is found to use antibiotics or sulfa drugs for treatment, recovery can not be reared to ensure the successful breeding. Innovative jet embedded nylon technology maximizes the efficiency of sample collection from patients. Nylon adheres vertically and evenly to the surface of the swab tip, improving the efficiency of cell and liquid sample collection and release. Increased analytical sensitivity, no specimen residue, and accelerated specimen processing. Flocked Swab,Collect swabs from specimens with flocked tips,Medical sampling swab oral nylon swab flocking,Acts in the clinical diagnosis Jiangsu iiLO Biotechnology Co., Ltd. , https://www.sjiilobiotech.com