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On 10 March 1988, China's first baby conceived through human in vitro fertilization (IVF) and embryo transfer (ET), commonly referred to as a test-…
ReproductionExperimentsFertilityMesenchyme is a type of animal tissue comprised of loose cells embedded in a mesh of proteins and fluid, called the extracellular matrix. The loose,…
MesenchymeGastrulationStem CellsMesenchymal Stem CellsEmbryologyWilhelm August Oscar Hertwig contributed to embryology through his studies of cells in development and his discovery that only one spermatozoon is…
PeopleFertilizationBiographySpermOvaIn 1975 John Gurdon, Ronald Laskey, and O. Raymond Reeves published "Developmental Capacity of Nuclei Transplanted from Keratinized Skin Cells of…
Nuclear Transfer TechniquesExperimentsPublicationsFrogsNuclear TransplantationLife Magazine's 1965 cover story "Drama of Life Before Birth" featured photographs of embryos and fetuses taken by Swedish photojournalist Lennart…
LiteratureFetusPublicationsReproductionHuman DevelopmentLeonardo da Vinci was born on 15 April 1452, the illegitimate son of a young peasant girl by the name of Caterina and Ser Piero da Vinci, a well-…
PeopleBiographyFetusAnatomyHans Spemann was an experimental embryologist best known for his transplantation studies and as the originator of the "organizer" concept. One of his…
PeopleSpemann, Hans, 1869-1941TransplantationBiographyJames Graves Wilson's six principles of teratology, published in 1959, guide research on teratogenic agents and their effects on developing organisms…
TeratologyAbnormalities, HumanCongenital AbnormalitiesBirth DefectsCongenital DefectsCarl Gottfried Hartman researched the reproductive physiology of opossums and rhesus monkeys. He was the first to extensively study the embryology…
PeopleReproductionBiographyOpossumsmonkeysJacques Loeb experimented on embryos in Europe and the United States at the end of the nineteenth and beginning of the twentieth centuries. Among…
PeopleParthenogenesisBiography