The use of bovine B-ultrasound for early fetal diagnosis of pregnant livestock has practical significance for the breeding industry. In the 1980s, foreign countries conducted research on early fetal diagnosis of livestock such as cattle, horses, and sheep, and explored its promotion and application in large-scale farms and ranches. Early pregnancy based male and female fetal diagnosis not only meets the needs of veterinary clinical diagnosis, but also changes the breeding process, allowing buyers with different purposes to choose pregnant livestock with specific male and female fetuses. Early intervention can also be carried out as needed, choosing to terminate or continue the pregnancy to obtain offspring from specific males and females. Due to the low invasiveness, non invasiveness, and reproducibility of fetal diagnosis using B-ultrasound in cattle, it has significant application value in production, breeding, and assisted reproductive technology. With the development of China's dairy farming industry and the improvement of breeding level, the application of early male and female diagnosis of pregnant cow fetuses will inevitably become a trend in China.

B-ultrasound image of a heifer

The use of bovine B-ultrasound for male and female fetal diagnosis is mainly based on the developmental laws of the fetus. The morphological characteristics of the external genitalia of the fetus are examined by scanning and imaging with bovine B-ultrasound, and the gender of the fetus is determined based on the relative position of reproductive nodules at different stages of pregnancy. The reproductive nodules have a two lobed structure, which is an embryonic structure that can develop into the penis of a bull or the clitoris of a cow. The use of bovine B-ultrasound for male and female fetal diagnosis has been successful in cattle, horses, water buffaloes, and goats, with diagnostic accuracy rates of over 90%.

link: https://www.bxlimage.com/nw/400.html