Embryo transplantation acceptor cattle estrus synchronization method

Abstract

The invention relates to a method of estrus synchronization of embryo transplantation receptor cow, which belongs to the field of embryo engineering. The method of estrus synchronization of embryo transplantation receptor cow is characterized in that: Cue-Mate (vaginal suppository) is put into the body of the receptor cow on any day of estrus circle of the cow, then the cow is injected with 100microgram of GnRH and the day is set as a first day; on a fifth day to a seventh day, the vaginal suppository is taken out and the cow is injected with 500microgram of PG; two days later, the cow ovulates; and the transplantation is carried out 7 to 7.5 days after the ovulation. Using the method, time for treating the cow is shortened; application efficiency of the cow is enhanced and breeding cost is saved; the ovulation rate of the cow after the treating is enhanced to 85 to 90 percent from the original 75 to 80 percent.

Description

technical field

[0001] The invention relates to the field of embryo engineering, in particular to the technology of embryo transplantation using estrus synchronization. Background technique

[0002] Embryo transfer is the technique of taking out the early embryo of a fine-bred cow after mating, and transplanting it into another cow of the same species with the same physiological state, so that it can continue to develop into an individual. Due to the high economic value of cattle, which are single-born animals, the number of litters is small, and the breeding cycle is long, the effect of purebred expansion breeding and cattle improvement by embryo transfer technology is good and fast. The technology of applying certain hormones or drugs and animal husbandry management measures to artificially control female animal groups to estrus and ovulate at the same time is called estrus synchronization. The basic principle of estrus synchronization is to control the estrus and ovulati...