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    Abutilon pollen grain — Stock Photo
    Abutilon pollen grain
    Fungal cells revealing sporangium with spores — Stock Photo
    Fungal cells revealing sporangium with spores
    3d illustration of sperm cells frozen into ice cubes. — Stock Photo
    3d illustration of sperm cells frozen into ice cubes.
    Healthy human sperm cells — Stock Photo
    Healthy human sperm cells
    Female reproductive system — Stock Photo
    Female reproductive system
    Healthy human sperm cells — Stock Photo
    Healthy human sperm cells
    Fungal cells and sporangia — Stock Photo
    Fungal cells and sporangia
    Daisy pollen grain — Stock Photo
    Daisy pollen grain
    Colored scanning electron micrograph of pollen grains from marigold flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from marigold flower.
    Healthy human sperm cells — Stock Photo
    Healthy human sperm cells
    Transparent cells on purple background, digital illustration. — Stock Photo
    Transparent cells on purple background, digital illustration.
    Blood clotting in an ovarian follicle — Stock Photo
    Blood clotting in an ovarian follicle
    Close-up illustration of colored pollen grain of mimosa plant. — Stock Photo
    Close-up illustration of colored pollen grain of mimosa plant.
    Skimmia sp. pollen grain — Stock Photo
    Skimmia sp. pollen grain
    Human sperm cells — Stock Photo
    Human sperm cells
    Transparent cells on white background, digital illustration. — Stock Photo
    Transparent cells on white background, digital illustration.
    Secondary follicles in an ovary — Stock Photo
    Secondary follicles in an ovary
    Colored scanning electron micrograph of immature pig sperm from epididymis. — Stock Photo
    Colored scanning electron micrograph of immature pig sperm from epididymis.
    Human sperm approaching egg cell, digital illustration. — Stock Photo
    Human sperm approaching egg cell, digital illustration.
    3d illustration of sperm cells on blue background. — Stock Photo
    3d illustration of sperm cells on blue background.
    Parasites attacking sperm cell, conceptual illustration. — Stock Photo
    Parasites attacking sperm cell, conceptual illustration.
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    Illustration of 4 cell stage egg on black background. — Stock Photo
    Illustration of 4 cell stage egg on black background.
    Fungal cells revealing sporangium with spores — Stock Photo
    Fungal cells revealing sporangium with spores
    Horse chestnut pollen grain — Stock Photo
    Horse chestnut pollen grain
    Breast tissue showing adenocarcinoma — Stock Photo
    Breast tissue showing adenocarcinoma
    Illustration of 4 cell stage egg on black background. — Stock Photo
    Illustration of 4 cell stage egg on black background.
    Ovarian cancer cells, coloured scanning electron micrograph. — Stock Photo
    Ovarian cancer cells, coloured scanning electron micrograph.
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Sperm cell in a fallopian tube — Stock Photo
    Sperm cell in a fallopian tube
    Colored scanning electron micrograph of immature pig sperm from epididymis. — Stock Photo
    Colored scanning electron micrograph of immature pig sperm from epididymis.
    3d illustration of sperm cells moving towards human womb. — Stock Photo
    3d illustration of sperm cells moving towards human womb.
    Uterine cancer. Computer illustration showing a cancerous tumour in the uterus and a close-up view of a cancer cell — Stock Photo
    Uterine cancer. Computer illustration showing a cancerous tumour in the uterus and a close-up view of a cancer cell
    Light micrograph (LM). Longitudinal section through the thallus and sporangium of a liverwort (Pellia epiphylla). — Stock Photo
    Light micrograph (LM). Longitudinal section through the thallus and sporangium of a liverwort (Pellia epiphylla).
    Fungal cells showing sporangium — Stock Photo
    Fungal cells showing sporangium
    Duct lined with pseudostratified epithelium — Stock Photo
    Duct lined with pseudostratified epithelium
    3d illustration of red transparent sperm cells swimming towards egg cell. — Stock Photo
    3d illustration of red transparent sperm cells swimming towards egg cell.
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    3d illustration of damaged spermatozoon in human sperm. — Stock Photo
    3d illustration of damaged spermatozoon in human sperm.
    Ovarian cancer cells, coloured scanning electron micrograph. — Stock Photo
    Ovarian cancer cells, coloured scanning electron micrograph.
    3d illustration of sperm cells approaching egg cell on colorful blue background. — Stock Photo
    3d illustration of sperm cells approaching egg cell on colorful blue background.
    Illustration of 4 cell stage egg on blue background. — Stock Photo
    Illustration of 4 cell stage egg on blue background.
    Duct is lined with pseudostratified epithelium — Stock Photo
    Duct is lined with pseudostratified epithelium
    Close-up illustration of colored pollen grain of mimosa plant. — Stock Photo
    Close-up illustration of colored pollen grain of mimosa plant.
    Chinese hibiscus pollen — Stock Photo
    Chinese hibiscus pollen
    Cross-section through a fallopian tube — Stock Photo
    Cross-section through a fallopian tube
    Illustration of human egg cell and sperm on blue background. — Stock Photo
    Illustration of human egg cell and sperm on blue background.
    Passion flower pollen — Stock Photo
    Passion flower pollen
    Human egg cell surrounded by numerous spermatozoa, digital illustration of fertilization. — Stock Photo
    Human egg cell surrounded by numerous spermatozoa, digital illustration of fertilization.
    Coloured scanning electron micrograph of ovarian cancer cells. — Stock Photo
    Coloured scanning electron micrograph of ovarian cancer cells.
    Coloured scanning electron micrograph of pollen grains from Verbena bonariensis perennial plant. — Stock Photo
    Coloured scanning electron micrograph of pollen grains from Verbena bonariensis perennial plant.
    3d illustration of sperm cells moving towards human womb. — Stock Photo
    3d illustration of sperm cells moving towards human womb.
    Sperm cell, or spermatozoa — Stock Photo
    Sperm cell, or spermatozoa
    Human Fertilisation, computer illustration — Stock Photo
    Human Fertilisation, computer illustration
    Transparent sperm cells moving towards round red colored egg cell, illustration. — Stock Photo
    Transparent sperm cells moving towards round red colored egg cell, illustration.
    Angel trumpets pollen grain — Stock Photo
    Angel trumpets pollen grain
    Fungal cells with sporangia and spores — Stock Photo
    Fungal cells with sporangia and spores
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes. — Stock Photo
    Colored scanning electron micrograph of sectioned seminiferous tubule, site of sperm production in human testes.
    Fungal cells showing sporangium — Stock Photo
    Fungal cells showing sporangium
    Digital illustration of female reproductive system and Chlamydia trachomatis bacteria causing Chlamydial infection. — Stock Photo
    Digital illustration of female reproductive system and Chlamydia trachomatis bacteria causing Chlamydial infection.