This bovine ova and embryo slide set is designed to teach students about nomenclature, important anatomical structures, and embryo grading according to the IETS standards. It includes microphotographs with 4X, 10X, and 40X objectives. Much attention has been paid to unfertilized ova and degenerated embryos to make sure the student can make a proper diagnosis of embryo maturity and viability. Arrows point to important landmarks on many of the images, and a written descriptive narrative accompanies each slide.