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    Normal sperm cells — Stock Photo
    Normal sperm cells
    Immature dog sperm — Stock Photo
    Immature dog sperm
    Human sperm cells — Stock Photo
    Human sperm cells
    View of Fetus at 38 weeks — Stock Photo
    View of Fetus at 38 weeks
    Human fetus developing at week 31, computer illustration. — Stock Photo
    Human fetus developing at week 31, computer illustration.
    Transparent sperm cells moving towards round blue coloured egg cell. — Stock Photo
    Transparent sperm cells moving towards round blue coloured egg cell.
    Human fetus developing at week 15, computer illustration. — Stock Photo
    Human fetus developing at week 15, computer illustration.
    View of Fetus at 12 weeks — Stock Photo
    View of Fetus at 12 weeks
    Human four-cell embryo, digital illustration. — Stock Photo
    Human four-cell embryo, digital illustration.
    Digital illustration of budding Saccharomyces cerevisiae yeast cells. — Stock Photo
    Digital illustration of budding Saccharomyces cerevisiae yeast cells.
    3d illustration of human sperm cells in reproductive process. — Stock Photo
    3d illustration of human sperm cells in reproductive process.
    Illustration of silhouette of pregnant woman with visible uterus and implanted blastocyst. — Stock Photo
    Illustration of silhouette of pregnant woman with visible uterus and implanted blastocyst.
    Seminiferous tubules and lending cells — Stock Photo
    Seminiferous tubules and lending cells
    Malassezia skin fungus, computer illustration — Stock Photo
    Malassezia skin fungus, computer illustration
    Human sperm cells, abstract computer illustration. — Stock Photo
    Human sperm cells, abstract computer illustration.
    Sperm fertilizing egg, digital illustration. — Stock Photo
    Sperm fertilizing egg, digital illustration.
    Human x chromosomes — Stock Photo
    Human x chromosomes
    Molecular model of follicle-stimulating hormone. — Stock Photo
    Molecular model of follicle-stimulating hormone.
    Abstract pollen grains from various plants differ in size and shape, computer illustration. — Stock Photo
    Abstract pollen grains from various plants differ in size and shape, computer illustration.
    Illustration of human foetus on week 40 term term. — Stock Photo
    Illustration of human foetus on week 40 term term.
    Coho Salmon, also known as Silver Salmon (Oncorhynchus kisutch) in the act of spawning in an Alaskan stream during autumn; Alaska, United States of America — Stock Photo
    Coho Salmon, also known as Silver Salmon (Oncorhynchus kisutch) in the act of spawning in an Alaskan stream during autumn; Alaska, United States of America
    Colored scanning electron micrograph of immature pig sperm from epididymis. — Stock Photo
    Colored scanning electron micrograph of immature pig sperm from epididymis.
    Fertilization of human egg — Stock Photo
    Fertilization of human egg
    3d illustration of sperm cells on blue background. — Stock Photo
    3d illustration of sperm cells on blue background.
    Illustration of human silhouette with inflamed uterus. — Stock Photo
    Illustration of human silhouette with inflamed uterus.
    Illustration of human foetus on week 11 term. — Stock Photo
    Illustration of human foetus on week 11 term.
    Passion flower pollen — Stock Photo
    Passion flower pollen
    Coloured scanning electron micrograph (SEM) of a wood anemone (Anemone nemerosa) anther (male reproductive part) covered in pollen. — Stock Photo
    Coloured scanning electron micrograph (SEM) of a wood anemone (Anemone nemerosa) anther (male reproductive part) covered in pollen.
    3d illustration of sperm cells moving towards human womb. — Stock Photo
    3d illustration of sperm cells moving towards human womb.
    Digital conceptual illustration of fertilisation of egg cell with spermatozoa. — Stock Photo
    Digital conceptual illustration of fertilisation of egg cell with spermatozoa.
    Coloured scanning electron micrograph of ovarian cancer cells. — Stock Photo
    Coloured scanning electron micrograph of ovarian cancer cells.
    View of Fetus at 29 weeks — Stock Photo
    View of Fetus at 29 weeks
    Abstract pollen grains from various plants differ in size and shape, computer illustration. — Stock Photo
    Abstract pollen grains from various plants differ in size and shape, computer illustration.
    Biotechnology or biotech, concept of creation, division and cellular development. High organic technology with productive purposes — Stock Photo
    Biotechnology or biotech, concept of creation, division and cellular development. High organic technology with productive purposes
    Digital illustration of Penicillium roqueforti fungus used in cheesemaking. — Stock Photo
    Digital illustration of Penicillium roqueforti fungus used in cheesemaking.
    View of Fetus at 23 weeks — Stock Photo
    View of Fetus at 23 weeks
    Geranium pollen grain — Stock Photo
    Geranium pollen grain
    Illustration of red human embryo on black background at pregnancy stage of week 25. — Stock Photo
    Illustration of red human embryo on black background at pregnancy stage of week 25.
    Fungus releasing spores, computer illustration — Stock Photo
    Fungus releasing spores, computer illustration
    View of Fetus at 11 weeks — Stock Photo
    View of Fetus at 11 weeks
    3d illustration of sperm cells frozen into ice cubes. — Stock Photo
    3d illustration of sperm cells frozen into ice cubes.
    Pollen grains of mimosa flower, digital illustration. — Stock Photo
    Pollen grains of mimosa flower, digital illustration.
    Destruction of a human embryo — Stock Photo
    Destruction of a human embryo
    Meiotic cell division — Stock Photo
    Meiotic cell division
    View of Full-term fetus — Stock Photo
    View of Full-term fetus
    Two orange and black beetles on yellow flowers in Cave Creek Canyon of the Chiricahua Mountains near Portal; Arizona, United States of America — Stock Photo
    Two orange and black beetles on yellow flowers in Cave Creek Canyon of the Chiricahua Mountains near Portal; Arizona, United States of America
    View of Fetus at 16 weeks — Stock Photo
    View of Fetus at 16 weeks
    Coloured scanning electron micrograph (SEM) of an anther (male reproductive part) from a bay tree (Laurus nobilis) flower. — Stock Photo
    Coloured scanning electron micrograph (SEM) of an anther (male reproductive part) from a bay tree (Laurus nobilis) flower.
    Illustration of red human embryo on black background at pregnancy stage of week 36. — Stock Photo
    Illustration of red human embryo on black background at pregnancy stage of week 36.
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell. — Stock Photo
    Conceptual 3d illustration of artificial insemination, in vitro fertilization of human egg cell.
    Pregnant woman and 6 week embryo — Stock Photo
    Pregnant woman and 6 week embryo
    Illustration of human foetus on week 5 of pregnancy. — Stock Photo
    Illustration of human foetus on week 5 of pregnancy.
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Broadbean pollen grain — Stock Photo
    Broadbean pollen grain
    Kingella kingae bacteria, computer illustration. K. kingae is a Gram-negative coccobacillus that is part of the normal flora of children's throats. It can occasionally cause invasive disease, primarily osteomyelitis (bone infection) — Stock Photo
    Kingella kingae bacteria, computer illustration. K. kingae is a Gram-negative coccobacillus that is part of the normal flora of children's throats. It can occasionally cause invasive disease, primarily osteomyelitis (bone infection)
    Penicillium fungus, Computer illustration — Stock Photo
    Penicillium fungus, Computer illustration
    Colored human embryonic stem cells, digital illustration. — Stock Photo
    Colored human embryonic stem cells, digital illustration.
    Fertilisation of egg cell with spermatozoa, digital illustration. — Stock Photo
    Fertilisation of egg cell with spermatozoa, digital illustration.
    Red blood cells and platelets — Stock Photo
    Red blood cells and platelets
    Human embryo with four cells — Stock Photo
    Human embryo with four cells