active sperm cells swim the egg pink background concept pregnancy fertilization |
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| navigate by keyword : analysis aspiration baby bio biological biology birth cell chromosome competition concept conception dna egg evolution female fertile fertility fertilization fertilize genetic health human insemination life male medical medicine microscope ovulation ovule ovum parent penetration pregnancy pregnant procreation reproduction research science seed semen sex sperm spermatozoa spermatozoon |
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| Active sperm cells swim to the egg on a pink background. The concept of pregnancy, fertilization of the egg. |
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