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Embryo with yolk sac from the velvet belly lanternshark (Etmopterus spinax) by Klaus Steinkamp
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Two embryos with yolk sacs from the velvet belly lanternshark (Etmopterus spinax) by Klaus Steinkamp
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Foetus at 7 weeks old illustration by SEBASTIAN KAULITZKISCIENCE PHOTO LIBRARY
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Embryo at 3 weeks of gestation illustration by SEBASTIAN KAULITZKISCIENCE PHOTO LIBRARY
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Embryo at 2 weeks of gestation illustration by SEBASTIAN KAULITZKISCIENCE PHOTO LIBRARY
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Human embryo at 8 weeks illustration At 8 weeks of gestation most of the amnion and chorion have fused At the embryonic pole closest to the umbilic
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Human embryo at 6 weeks illustration
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Blastocyst illustration
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Blastocyst illustration
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Eight-week-old foetus This foetus is seen during the end stage of the first trimester It is attached to the placenta and the mothers blood circulat
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Human embryo illustration
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Human embryo illustration
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Placental circulation illustration The umbilical arteries (red) and veins (blue) terminate in the placenta as tree-like villi Between the villi are
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Human embryo with yolk sac illustration
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Illustration embryo at 13 days Photo by DK IMAGESSCIENCE PHOTO LIBRARY
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Illustration of a developing embryo in the womb at 5 weeks during neural tube formation Photo by DK IMAGESSCIENCE PHOTO LIBRARY
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Developing bird foetus in egg illustration
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Fertilised bird egg cutaway illustration This egg (from a chicken) has a yolk (yellow) and egg white (albumen) enclosed in an egg shell (white) Th
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Freshly layed eggs belonging to the whistling frog Eleutherodactylus urichi shrevei from the Caribbean island of St Vincent These frogs lay clutche
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Eight-week-old foetus This foetus is seen during the end stage of the first trimester It is attached to the placenta and the mothers blood circulat
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Chicken embryo
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Embryo at 4 weeks 3-D ultrasound scan
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Human foetus 7-8 weeks old
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Foetal genetic development Artwork representing the genetic development of a human foetus Only the outer part of the foetus is visible but the holl
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Human egg cells Coloured scanning electron micrograph of the surface of the ovary of an embryo 7-8 weeks after fertilisation Several primordial egg
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SEM of two primordial egg cells
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False-colour SEM of a primordial germ cell
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Yolk granules
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Yolk granules
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Eight-week-old foetus This foetus is seen during the end stage of the first trimester It is attached to the placenta and the mothers blood circulat
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Amniote embryo anatomy Illustration of the anatomical features common to the embryos of all amniotes The amniotes are the tetrapod vertebrates rept
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Light micrograph through human tissue showing endodermal sinus tumour It is a rare type of cancer that begins in germ cells (cell that form sperm or
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Stem cell research Professor Magdalena Zernicka-Goetz talking to her scientists in an embryology laboratory Zernicka-Goetzs team of scientists from
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Stem cell research Researcher holding a child box containing a number of mouse embryos at various stages of development This team of scientists from
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Stem cell research Researcher monitoring the development of mouse embryos under a microscope in an embryology laboratory This team of scientists fro
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Stem cell research Researcher monitoring the development of mouse embryos under a microscope in an embryology laboratory This team of scientists fro
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Stem cell research Researcher working with stem cells in an embryology laboratory This team of scientists from Cambridge University UK have create
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Stem cell research Researcher monitoring the development of mouse embryos under a microscope in an embryology laboratory This team of scientists fro
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Stem cell research Researcher monitoring the development of mouse embryos under a microscope in an embryology laboratory This team of scientists fro
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Eight-week-old foetus This foetus is seen during the end stage of the first trimester It is attached to the placenta and the mothers blood circulat
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Stem cell research Close-up of the development of mouse embryos being monitored under a microscope in an embryology laboratory This team of scientis
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Stem cell research Close-up of the development of mouse embryos being monitored under a microscope in an embryology laboratory This team of scientis
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Stem cell research Researcher monitoring the development of mouse embryos under a microscope in an embryology laboratory This team of scientists fro
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Stem cell research Researcher viewing mouse embryos under a microscope in an embryology laboratory This team of scientists from Cambridge University
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Stem cell research Researcher working with stem cells in an embryology laboratory This team of scientists from Cambridge University UK have create
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Stem cell research Researcher working with stem cells in an embryology laboratory This team of scientists from Cambridge University UK have create
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Stem cell research Researchers working with stem cells in an embryology laboratory This team of scientists from Cambridge University UK have creat
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Stem cell research Researchers working with stem cells in an embryology laboratory This team of scientists from Cambridge University UK have creat
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Stem cell research Professor Magdalena Zernicka-Goetz holding a print of a mouse embryo in the early stages of development and division Zernicka-Goe
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Eight week old foetus Illustration of a human foetus in side view 8 weeks old in the womb It has a human-like appearance and is seen surrounded by
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Stem cell research Professor Magdalena Zernicka-Goetz holding a print of a mouse embryo in the early stages of development and division Zernicka-Goe
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Stem cell research Researchers working with stem cells in an embryology laboratory This team of scientists from Cambridge University UK have creat
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Stem cell research Researchers working with stem cells in an embryology laboratory This team of scientists from Cambridge University UK have creat
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Stem cell research Researcher using a laser microscope to chart the cell division of stem cells in an embryology laboratory This team of scientists
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Dinosaur egg Computer illustration of a section through a dinosaur egg showing the foetus inside
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Coloured X-ray of hen eggs Air bubbles and the yolk sac can be seen
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Zebrafish light micrograph
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The development of a young trout from egg to 90 days old
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Umbilical adenoma light micrograph An umbilical adenoma (raspberry tumour) is a patch of vitelline epithelium left behind when the vitelline duct (a
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Illustration of the abortion of an early embryo At centre within the pregnant female uterus can be seen the amniotic sac (blue) and the yolk sac (y
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Umbilical adenoma light micrograph An umbilical adenoma (raspberry tumour) is a patch of vitelline epithelium left behind when the vitelline duct (a
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Yolk sac tumour light micrograph of an affected testis A testicular yolk sac tumour is the most common childhood testicular tumour (80) with most
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Yolk sac tumour light micrograph of an affected testis A testicular yolk sac tumour is the most common childhood testicular tumour (80) with most
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Light micrograph through human tissue showing endodermal sinus tumour It is a rare type of cancer that begins in germ cells (cell that form sperm or
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Bird egg Computer artwork showing a bird embryo developing inside its egg
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Blastocyst implantation Artwork of the blastocyst (lower right) a cellular stage that occurs during human (and all mammalian) reproduction five day
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Blastocyst implantation Diagram of the blastocyst (lower right) a cellular stage that occurs during human (and all mammalian) reproduction five day
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Salmon (Salmo sp) eggs and newly hatched fish (alevins) All salmon return to rivers to spawn The eggs are laid in gravel on the river bed in late a
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Salmon (Salmo sp) eggs and newly hatched fish (alevins) All salmon return to rivers to spawn The eggs are laid in gravel on the river bed in late a
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Egg cells Coloured scanning electron micrograph of the surface of an ovary of a human embryo 9 weeks after fertilisation Three primordial egg or ger
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Human embryo at 6 weeks gestation measuring approximately 13 mm crown to rump
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Human embryo at 7 weeks gestation measuring approximately 14 mm (crown to rump)
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Pond snail egg masses Light micrograph of the underside of a white water lily (Nymphaea alba) leaf (green) showing a number of great pond snail (Lym
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Pond snail egg mass Light micrograph showing a number of great pond snail (Lymnaea stagnalis) eggs (clear blobs) surrounded by a jelly mass (sausage
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Frog tadpole Close-up of a two-day-old tadpole of the common frog (Rana temporaria) showing its gills (frond-like upper left) This is the external
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Chicken embryo Light micrograph of the embryo of a chicken (Gallus domestica) after 3 days of development surrounded by the amniotic membrane and th
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Chicken embryo light micrograph
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Immunofluorescence light micrograph of a human embryo 11 days after fertilisation The embryonic cells have begun to differentiate and self-organise
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Immunofluorescence light micrograph of four human embryos 10 days after fertilisation The embryonic cells have begun to differentiate and self-organi
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Immunofluorescence light micrograph of a human embryo 10 days after fertilisation The embryonic cells have begun to differentiate and self-organise
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Early embryonic development Illustration showing an early stage of the development of a human embryo just after gastrulation with the newly forming
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Gastrulation during embryonic development illustration
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Eight-week-old foetus This foetus is seen during the end stage of the first trimester It is attached to the placenta and the mothers blood circulat
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