Early pregnancy diagnosis
The use of rectal ultrasound scanning can carefully observe the early embryos of dairy cows and make accurate pregnancy diagnosis according to the image characteristics of different periods, and it will not cause damage to the mother and the fetus. Generally speaking, it is better to use 5.0MHz or 7.5MHz probe.
Ultrasonic detection of cow embryos and fetuses showed that discontinuous non-reflective cells appeared in the uterine cavity from 12 to 14 days after