After a cow becomes pregnant, it is necessary to take good care of the fetus to ensure its normal development and safe delivery, and to prevent miscarriage. Imported cows are often used for B-ultrasound examination of pregnancy.

The factors causing miscarriage in pregnant cows include fetal death during pregnancy; Pregnant cows suddenly experience abnormal contractions; If the endocrine regulation function of cows is disrupted and they lose their ability to protect the fetus, imported cows should be used for B-ultrasound examination to check the survival of the fetus. Within two months of pregnancy, the embryo of a cow is in a free state in the uterus, and the fetus transitions from relying on the secretion of uterine milk from the endometrium as nutrition to relying on the placenta to absorb nutrients from the mother.

After a cow becomes pregnant, if the feeding level of the pregnant cow is low and the secretion of uterine milk is insufficient, it will affect fetal development and cause embryo death. In the late stage of pregnancy, the fetus develops rapidly. If there is insufficient nutrition and strong stimulation, it can also cause miscarriage. It is necessary to frequently use imported cattle to monitor the condition of the fetus with ultrasound.

In response to the above situation, it is necessary to strengthen the management of pregnant cattle feeding, meet their nutritional needs, especially protein (such as cakes and fish meal), ensure supply, and supplement with vitamin A and vitamin E; Lack of green feed in winter and spring seasons, can be supplemented with malt or silage feed; We also need to supplement bone meal to prevent cow and calf cartilage disease; To prevent feeding feed that is moldy, spoiled, has excessive acidity, or is frozen and toxic; Pregnant cows should exercise appropriately to prevent fright, whipping, and slipping. Squeezing and reducing labor, labor must be stopped one month before delivery, single stable feeding, and ready to take delivery at any time.

After mating, if a cow no longer shows estrus, has a gentle temperament, an increased appetite, and has fat and shiny fur, it can generally be considered pregnant. However, the best method is to use imported cows for ultrasound diagnosis using B-ultrasound, which is the simplest and most effective method.

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