This is the most commonly used method for midwifery. When the cow's cervix is ​​fully opened, there is no abnormality in the pelvis, and fetal position, fetal orientation, normal fetal potential and insufficient productivity are used for midwifery. The recommended dose for veterinary pharmacology is 75 to 100 IU, which can be repeated at intervals of 15 minutes. However, the actual dose used is often larger than the recommended dose, and it is often used repeatedly. Use oxytocin for midwifery, should not use too early and excessive, should pay close attention to the uterine contraction and the degree of opening of the cervix. Because the normal contraction of the uterus is an intermittent contraction, this is very important for the safety of the fetus. If used too early, it can cause serious consequences such as uterus and vaginal prolapse. If the injection is excessive, the uterus exhibits tetanic contraction, the blood vessels on the placenta are continuously compressed, the blood flow is slowed or interrupted, and the fetus is hypoxia-ischemia. At this time, if the fetus cannot be discharged smoothly, suffocation may occur. Therefore, when the uterine cervix is ​​not opened, it is necessary to first inject estrogen or cloprostenol, etc., and combine with artificial neck extension, and then use oxytocin after the cervical spondylosis is expanded. Oxytocin should be banned if cows produce too long, shock, tachycardia, etc.

Preventing the application of suitable oxytocin within 12 hours after the delivery of the placenta is helpful for the discharge of the placenta. When dairy cows are used 24 hours after delivery, the effect is slight. The use of multi-injection and intravenous injection. Due to variety and individual differences, dairy cows have different sensitivities to oxytocin. The dosage is 100 to 200 international units and can be administered once or in divided doses.

With antibiotic treatment of endometritis and uterine empyema use oxytocin contraction of the role of the uterus can promote the discharge of uterine inflammatory products, accelerate the purification of the endometrium. According to reports, in the treatment of diseased cattle suffering from chronic endometritis, first intramuscular injection of 10-20 mg of estrogen, 4 to 6 hours interval intramuscular injection of oxytocin 50 international units, twice daily injection, even for three days, The cure rate is above 20%. In the treatment of uterine empyema, first 50 to 100 mg of estrogen is injected intramuscularly, and oxytocin is injected after 48 hours.

Prolactin oxytocin stimulates the contraction of myoepithelial cells of the mammary glands and causes milking reflexes. It plays an important role in the process of breast milk discharge. When the cows suffering from breast dysfunction or endocrine dysfunction cause sudden milklessness or lack of lactation after calving, they may be given 50 IU of intramuscular injection of oxytocin once a week for 3 weeks. After 4 weeks, the diseased cow can produce milk. For dairy cows suffering from poor milking due to pain, disease or other reasons, 60 international units of oxytocin can be injected intravenously every day after massaging and squeezing the milk for 4 consecutive days.

Treatment of persistent corpus luteum by intramuscular injection of large doses of exogenous oxytocin, supplementation of cow oxytocin deficiency, to achieve the regulation of prostaglandin secretion, can indirectly achieve the purpose of dissolution of persistent corpus luteum. According to reports, the intramuscular injection of oxytocin 100 international units every 2 hours, 4 times and every 2 hours of submucosa injection of oxytocin 50 international units, 4 consecutive times, respectively, for treatment trials, the cure rate was 60% and 80%, respectively .

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