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Proportion of cows pregnant at various days of gestation as affected by type of embryo transferred into the uterus. Cows received either a control embryo (inverted triangle), an embryo cultured with CSF2 (closed circle) or an embryo cultured with DKK1 (open circle). Data at day 280 represent percent of cows that calved. The figure is reproduced with slight modification from ref. 81.
