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In her experiment, McPherson and colleagues created a set-up holding human, mice and pig sperm cells in one part of the compartment and egg cells in the other, divided by a thin channel simulating the female reproductive tract.—Tereza Pultarova, Space.com, 27 Mar. 2026 Scientists at Colossal have cultivated primordial germ cells — early precursors to sperm and egg cells — from the pigeon, the dodo’s closest living relative.—Hanna Wickes, Miami Herald, 16 Mar. 2026 Scientists at the company have cultivated primordial germ cells — early precursors to sperm and egg cells — from the pigeon, the dodo’s closest living relative.—Hanna Wickes, Charlotte Observer, 16 Mar. 2026 Epigenetic Avenues In most animals, a sperm cell is tiny compared to an egg cell.—Ivan Amato, Quanta Magazine, 22 Dec. 2025 See All Example Sentences for egg cell