In this process, a donor cow is treated with a specific hormone (follicle stimulating hormone) to induce ovulation of multiple follicles. After standing estrus, she is inseminated to produce multiple embryos. Approximately 7 days after insemination, the embryos are collected from her uterus (“flushed”). These embryos are then either transferred into synchronized recipient (surrogate) cows or cryogenically frozen for later transfer.
Embryos recovered either from the procedure above or from other reproductive procedures, such as IVF (In-Vitro Fertilization) are transferred into recipient cows.