Look at milk. The milk that is squeezed out by hand is honey-colored and has a paste. Most of the non-flowing milk is pregnant cows. If it is white and thin, and the milk will naturally flow out of a squeeze, it is an empty-birth cow.
Look at the breasts. The breasts are swollen and the teat is straight. It is a pregnant cow. The opposite is not pregnant.
Look at the mouth. Open the mouth of the cow and look at the sublingual meat on both sides of the mouth. If it is bright red, it is a pregnant cow. If it is pink or light red, the cow is not pregnant.
Look at the tail. If the cow's tail covers the vulva without sagging, the cow is pregnant if he is inclined to the left or right. If the tail is vertically covered, the cow is not pregnant.
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