The application of biotechnology in animal husbandry has led to the industrialization of sheep embryo transfer and opened up new avenues for the expansion and breeding of excellent sheep breeds in China.

At present, healthy and high-quality ewes are selected as donors for sheep embryo transfer, and male sheep of the same type are bred to produce a large number of high-quality embryos. At the same time, healthy and common ewes of the same type are selected as recipients; Simultaneously with the donor's superovulation treatment, the recipient is subjected to synchronous estrus treatment to synchronize the development of the recipient's reproductive tract with the donor, but without mating; When the embryo develops to a certain extent in the donor's body, the developing embryo is surgically extracted from the fallopian tube or uterine horn, and high-quality embryos are selected and preserved under a microscope; Using surgical methods to transfer high-quality embryos extracted into the recipient's corpus luteum side fallopian tube or uterine horn, and using the abdomen of a common recipient to conceive the fetus of a good donor, thus producing a large number of excellent sheep breeds.

The above links are interrelated, and if one link is disconnected, the whole will fail. How to evaluate the processing effect of each link? In the past, relying more on experience and visual observation was neither scientific nor accurate, resulting in a lower success rate of embryo transfer. Although some have used laparoscopy to observe the effectiveness of superovulation and sheep to monitor receptor pregnancy and embryo development using B-ultrasound.

Ultrasound diagnosis technology for sheep is a painless, non-invasive, and relatively safe in vivo diagnostic method. Can provide ultrasound sectional images of the inspected area to observe the tissue structure of the inspected organ without damage. To solve the problem of outdated monitoring methods for sheep embryo transfer, improve its success rate and economic benefits, and fully utilize the characteristic of ultrasound, monitoring should be carried out in all stages of sheep embryo transfer. Especially in the selection of suppliers and receptors; The unique and effective features of donor superovulation monitoring, recipient early pregnancy diagnosis and embryo development monitoring, and monitoring of the recovery of the donor and recipient uterus and ovaries after treatment have been demonstrated.

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