embryo

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Introduction References & Edit History Related Topics

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first stages of human development

embryos of different animals

external genitalia

implanted human embryo

human embryonic development

human embryonic development

umbilical cord formation

embryonic development

Follow the development of rice-paddy fish from fertilization to hatching in a laboratory setting

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Easter Procession of Maria Santisima del Sacromonte in Granada, Spain. This statue is known as Virgen de los Gitanos or The Virgin of the Gypsies.

What is Holy Week?

July, 2006, Launch of Space Shuttle Discovery STS-121. See attached for full caption information.

Will Light-Speed Space Travel Ever Be Possible?

Shah Jahan. Taj Mahal. Mughal architecture. Emperor Shah Jahan fifth Mughal Emperor (reigned 1628-1658) India, Himachal Pradesh, Basohli or Jammu and Kashmir, Mankot, circa 1690 Drawings; Opaque watercolor, gold, and ink on paper (see notes)

6 Important Mughal Emperors

Nazi Germany, Nazi SS troops marching with victory standards at the Party Day rally in Nuremberg, Germany, 1933. (Schutzstaffel, Nazi Party, Nurnberg)

Why Was Nazi Germany Called the Third Reich?

Fish. Lionfish. Lion-fish. Turkey fish. Fire-fish. Red lionfish. Pterois volitans. Venomous fin spines. Coral reefs. Underwater. Ocean. Red lionfish swims by seaweed.

10 of the World’s Most Dangerous Fish

pg 229Nazi parade features a banner proclaiming, "Death to Marxism."The possibility of a peaceful Germany after World War I was precluded entirely by the terms of the Versailles Treaty and theintransigent hostility of France and England. Stripped of indu

Were the Nazis Socialists?

illustration of the walking titanosaurus, Patagotitan mayorum

Titanosaurs: 8 of the World's Biggest Dinosaurs

embryo: Related Content

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Shock as teen surrogate gives birth to twins for Chinese man, receives US$124,000 • Mar. 30, 2025, 4:00 PM ET (South China Morning Post)

Photos and Videos

first stages of human development

embryos of different animals

external genitalia

implanted human embryo

human embryonic development

human embryonic development

umbilical cord formation

embryonic development

Follow the development of rice-paddy fish from fertilization to hatching in a laboratory setting

Hear about the use of African clawed frogs in pregnancy tests and whole genome sequencing

How a human embryo develops into a fetus

See a movie illustrating wounded cells releasing signaling molecules causing a wave of calcium signaling

See All Videos and Images →

Topics

sexual differentiation gestational age implantation cleavage segmentation neural crest umbilical cord induction histogenesis notochord adolescence old age infancy puberty adulthood fetus zygote larva childhood aging

Dig Deeper: More Articles That Discuss This Topic

Key People

Hwang Woo Suk and Gerald Schatten

Hwang Woo-Suk

South Korean scientist

Moon Shin Yong

South Korean obstetrician

Ohsumi, Yoshinori

Yoshinori Ohsumi

Japanese biologist

Étienne Geoffroy Saint-Hilaire

French naturalist

Julian Huxley

Sir Julian Huxley

British biologist

Steen Willadsen

Danish embryologist

Christiane Nüsslein-Volhard

Christiane Nüsslein-Volhard

German geneticist

C.H. Waddington

British embryologist

Eric F. Wieschaus

American developmental biologist

Sir John Graham Kerr

British biologist

Belon, detail from an engraving

Pierre Belon

French naturalist

Fabricius ab Aquapendente, oil painting by an unknown artist

Hieronymus Fabricius ab Aquapendente

Italian surgeon

William Brooks

William Keith Brooks

American zoologist

Aleksandr Onufriyevich Kovalevsky

Russian embryologist

Martin H. Rathke

German anatomist