The cow's pregnancy ranged from 275 days to 285 days and the average gestation period was 280 days. Pregnant cows should enter the delivery room 15 days before delivery and 10-15 days after delivery. The delivery room should be well-lit, ventilated and dry. The cattle bed should be cleaned daily, kept dry, and clean the hay or wood chips. The delivery room is sterilized once a week. When pregnant cows are found to have discharge of colostrum juice, supine ligament subsidence, vaginal edema and other labor intensive, they should be ready to take delivery as soon as possible. Cows are dominated by natural births. For the first-produced cattle, the fetus is too large, the blame is long, and the bovine is weak. The midwife must be prepared for midwifery. All the midwifery devices should be strictly disinfected. Cows around the genital area are cleaned with disinfectant, and midwifery should be performed after rupture of the urine membrane. The yak produced must dry the body mucus in time, sterilize the umbilical cord with 3%-5% iodine, and record it. Calves are numbered in accordance with regulations, and colostrum is fed within two hours after delivery, and is removed within one week.
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