The invention discloses a dairy cow timed
insemination method for controlling
ovulation time and improving
embryo implantation rate, and relates to the technical field of dairy cow breeding. The problems that follicles on ovaries of postpartum cows are not synchronous in development,
ovulation time cannot be accurately regulated and controlled, and embryonic development regulation and control after fertilization are lacked are solved. The method mainly comprises the following steps: three times of
gonadotropin releasing
hormone injection, two times of cloprostenol
sodium injection,
gonadotropin releasing
hormone injection,
luteinizing hormone releasing
hormone A3 injection, timed artificial
semen deposition, and VADE mixed
liquid injection. GnRH is used for actively regulating follicular development, 95% or more of the dairy cows are synchronized after 2-3 rounds of starting, then timing
insemination is performed, the conception rate of the postpartum dairy cows can be remarkably increased, compared with the prior art, the pretreatment time is short, the synchronous
ovulation rate and conception rate of the dairy cows can be increased, the calving interval is shortened, and the
survival rate of the dairy cows is increased. The economic benefit of the
pasture is obviously increased, and the breeding
management level can be improved on the basis.