sperm and egg cell under the microscope embryology natural fertilization |
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| navigate by keyword : aspiration background biology blastocyst cell competition concept egg ejaculation embryo embryogenesis embryology female fertile fertility fertilization fertilize genetic health human illustration insemination life male medical medicine micro microscope microscopic natural nucleus oocyte ovulation ovule ovum penetration pregnancy procreation red reproduction research science semen semination sex sperm spermatozoa spermatozoid spermatozoon tail winner zygote |
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| Sperm and egg cell. Under the microscope. Embryology. Natural fertilization. 3d illustration on red background |
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