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    Illustration of red human embryo on black background at pregnancy stage of week 31. — Stock Photo
    Illustration of red human embryo on black background at pregnancy stage of week 31.
    Gastrotrich eggs. Coloured scanning electron micrograph (SEM) of a Chaetonotus sp. gastrotrich eggs. Gastrotrichs are microscopic, worm-like animals found in both freshwater and marine habitats — Stock Photo
    Gastrotrich eggs. Coloured scanning electron micrograph (SEM) of a Chaetonotus sp. gastrotrich eggs. Gastrotrichs are microscopic, worm-like animals found in both freshwater and marine habitats
    Computer illustration showing human hair with dandruff and close-up view of microscopic fungi Malassezia furfur associated with seborrhoeic dermatitis and dandruff formation — Stock Photo
    Computer illustration showing human hair with dandruff and close-up view of microscopic fungi Malassezia furfur associated with seborrhoeic dermatitis and dandruff formation
    Broom pollen grain — Stock Photo
    Broom pollen grain
    3d illustration of sperm cells on blue background. — Stock Photo
    3d illustration of sperm cells on blue background.
    View of fetus at 20 weeks — Stock Photo
    View of fetus at 20 weeks
    Magnified digital illustration of blastocyst cell. — Stock Photo
    Magnified digital illustration of blastocyst cell.
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual computer illustration. — Stock Photo
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual computer illustration.
    Human fetus developing at week 31, computer illustration. — Stock Photo
    Human fetus developing at week 31, computer illustration.
    Rapeseed pollen grain — Stock Photo
    Rapeseed pollen grain
    Christmas cactus pollen — Stock Photo
    Christmas cactus pollen
    Pregnant woman in black dress — Stock Photo
    Pregnant woman in black dress
    Fertilisation of egg cell with spermatozoa, digital illustration. — Stock Photo
    Fertilisation of egg cell with spermatozoa, digital illustration.
    3d illustration of broken or defective red colored x and y chromosomes. — Stock Photo
    3d illustration of broken or defective red colored x and y chromosomes.
    Illustration of human foetus on week 17 term. — Stock Photo
    Illustration of human foetus on week 17 term.
    Colored scanning electron micrograph of pollen grains from marigold flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from marigold flower.
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual illustration. — Stock Photo
    Transplacental transmission of HIV infecting 8 week human embryo, conceptual illustration.
    Illustration of 8 cell stage egg on blue background. — Stock Photo
    Illustration of 8 cell stage egg on blue background.
    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).
    Colored scanning electron micrograph of immature pig sperm from epididymis. — Stock Photo
    Colored scanning electron micrograph of immature pig sperm from epididymis.
    Ovarian cancer cells, coloured scanning electron micrograph. — Stock Photo
    Ovarian cancer cells, coloured scanning electron micrograph.
    Magnified digital illustration of fertilisation of egg cell. — Stock Photo
    Magnified digital illustration of fertilisation of egg cell.
    Sperm in a fallopian tube. Coloured composition scanning electron micrograph (SEM) of human sperm travelling through a fallopian tube (oviduct) of a female — Stock Photo
    Sperm in a fallopian tube. Coloured composition scanning electron micrograph (SEM) of human sperm travelling through a fallopian tube (oviduct) of a female
    Pregnant woman holding hand to tummy — Stock Photo
    Pregnant woman holding hand to tummy
    Human x chromosomes — Stock Photo
    Human x chromosomes
    Digital illustration of Penicillium roqueforti fungus used in cheesemaking. — Stock Photo
    Digital illustration of Penicillium roqueforti fungus used in cheesemaking.
    View of Fetus at 6 weeks — Stock Photo
    View of Fetus at 6 weeks
    Illustration of silhouette of pregnant woman and 40 week foetus. — Stock Photo
    Illustration of silhouette of pregnant woman and 40 week foetus.
    Bougainvillea pollen grain — Stock Photo
    Bougainvillea pollen grain
    Fertilisation of egg cell with spermatozoa, digital illustration. — Stock Photo
    Fertilisation of egg cell with spermatozoa, digital illustration.
    Male reproductive system — Stock Photo
    Male reproductive system
    View of Fetus at 6 weeks — Stock Photo
    View of Fetus at 6 weeks
    Malassezia skin fungus, computer illustration — Stock Photo
    Malassezia skin fungus, computer illustration
    Antelope buck in a grass field during rut; South Dakota, United States of America — Stock Photo
    Antelope buck in a grass field during rut; South Dakota, United States of America
    Malassezia skin fungus, computer illustration — Stock Photo
    Malassezia skin fungus, computer illustration
    Illustration of human foetus on week 5 on black background. — Stock Photo
    Illustration of human foetus on week 5 on black background.
    Bougainvillea pollen grain — Stock Photo
    Bougainvillea pollen grain
    Human sperm cells and egg cell — Stock Photo
    Human sperm cells and egg cell
    Malassezia skin fungus, computer illustration — Stock Photo
    Malassezia skin fungus, computer illustration
    Aspergillus fungus structure — Stock Photo
    Aspergillus fungus structure
    View of Fetus at 5 weeks — Stock Photo
    View of Fetus at 5 weeks
    Computer illustration showing human hair with dandruff and close-up view of microscopic fungi Malassezia furfur associated with seborrhoeic dermatitis and dandruff formation — Stock Photo
    Computer illustration showing human hair with dandruff and close-up view of microscopic fungi Malassezia furfur associated with seborrhoeic dermatitis and dandruff formation
    Transparent cells on white background, digital illustration. — Stock Photo
    Transparent cells on white background, digital illustration.
    Seminiferous tubules and lending cells — Stock Photo
    Seminiferous tubules and lending cells
    Human fetus developing at week 13, computer illustration. — Stock Photo
    Human fetus developing at week 13, computer illustration.
    Illustration of cancerous tumour in female uterus. — Stock Photo
    Illustration of cancerous tumour in female uterus.
    Illustration of inflamed uterus in silhouette of female body. — Stock Photo
    Illustration of inflamed uterus in silhouette of female body.
    Illustration of sperm fertilizing human egg cell. — Stock Photo
    Illustration of sperm fertilizing human egg cell.
    Fertilisation of egg cell with spermatozoa, digital illustration. — Stock Photo
    Fertilisation of egg cell with spermatozoa, digital illustration.
    Sporangium fungal cell with spores — Stock Photo
    Sporangium fungal cell with spores
    Human fetus developing at week 37, computer illustration. — Stock Photo
    Human fetus developing at week 37, computer illustration.
    Digital illustration of yeast and hyphae stages of Candida albicans fungus. — Stock Photo
    Digital illustration of yeast and hyphae stages of Candida albicans fungus.
    Healthy human sperm cells — Stock Photo
    Healthy human sperm cells
    Primula pollen grain — Stock Photo
    Primula pollen grain
    Human egg cell surrounded by numerous spermatozoa, digital illustration of fertilization. — Stock Photo
    Human egg cell surrounded by numerous spermatozoa, digital illustration of fertilization.
    Female scientist looking in microscope in in vitro fertilisation laboratory. — Stock Photo
    Female scientist looking in microscope in in vitro fertilisation laboratory.
    View of Fetus at 13 weeks — Stock Photo
    View of Fetus at 13 weeks
    Human four-cell embryo, digital illustration. — Stock Photo
    Human four-cell embryo, digital illustration.
    Male reproductive system — Stock Photo
    Male reproductive system
    Surface of a fallopian tube — Stock Photo
    Surface of a fallopian tube