Embryo transfer is an advanced reproductive technology which allows clients to multiply the success of genetically superior animals in the herd. Conventional (in vivo) embryo collection consists of super stimulating donor females with follicle-stimulating hormone (FSH) which causes multiple follicles to ovulate, this is followed by artificially inseminating (AI) the donor female and then a week later collecting or 'flushing' the embryos from the uterus. Those embryos are then either freshly transferred into recipient females or frozen under liquid nitrogen, the embryo can stay frozen until they are ready to be thawed and implanted.

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