Urine test method for judging whether sows are pregnant or not

Urine test method for judging whether sows are pregnant or not: about 10 milliliters of morning urine of sows 5 to 10 days after mating are tested, the specific gravity should be measured in the test tube (between 1.01 and 1.025), and then 1 ml of iodine is dropped. Heat it on the alcohol lamp and observe the color change when it reaches the boiling point. If you are pregnant, the urine appears red from top to bottom; if you are not pregnant, the urine is yellowish or brownish green, and the color of the urine disappears after cooling. The fourth is to use ultrasonic detector, which has high accuracy and can effectively reduce the empty rate of sows.