Grading cattle embryos for transfer or cryopreservation

Evaluating embryo quality prior to embryo transfer or cryopreservation relies on an embryologist’s experience. Within commercial laboratories, embryo quality is assessed visually using a dissecting microscope. Grading usually takes into account several factors including cell numbers, size of the inner cell mass, developmental stage compared to embryo age, the presence of extruded or degenerated cells, […]

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