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Mesoderm is one of the three germ layers, groups of cells that interact early during the embryonic life of animals and from which organs and tissues…
MesodermGastrulationCell differentiationCellsTissuesRichard Woltereck first described the concept of Reaktionsnorm (norm of reaction) in his 1909 paper 'Weitere experimentelle Untersuchungen uber Art-…
Woltereck, Richard, 1877-1944EvolutionDaphniaEmbryologyHeredityWilhelm Johannsen in Denmark first proposed the distinction between genotype and phenotype in the study of heredity in 1909. This distinction is…
Johannsen, W. (Wilhelm), 1857-1927Genotype-environment interactionPhenotypeHeredityGeneticsThis project focuses on the history of how teratogens, or agents which have the potential to cause birth defects, have been understood and tested for…
Teratogenicity testingHistory, 20th CenturyHistory, Twentieth CenturyEndoderm is one of the germ layers-- aggregates of cells that organize early during embryonic life and from which all organs and tissues develop.…
GastrulationEmbryosEmbryologyCellsTissuesFortunio Liceti studied natural philosophy and medicine in Italy during the first half of the seventeenth century. Liceti wrote greater than seventy…
TeratologyAbnormalities, HumanAnimals--AbnormalitiesEmbryologyPathologyBiology textbooks are everybody's business. In accepting the view that texts are created with specific social goals in mind, I examined 127 twentieth…
TextbooksBook IllustrationsPictorial WorkPublicationsRobert Geoffrey Edwards worked with Patrick Christopher Steptoe to develop in-vitro fertilization (IVF) techniques during the 1960s and 1970s in the…
PeopleFertilization in VitroReproductionBiographyFertilizationCarl Richard Moore was a professor and researcher at the University of Chicago in Chicago, Illinois who studied sex hormones in animals from 1916…
Moore, Carl R. (Carl Richard), 1892-1955Intersexuality in animalsIntersex peopleHormones, SexSex DifferentiationIn 1984, human genetics and reproduction researcher and physician Joseph D. Schulman founded the Genetics and IVF Institute, an international…
OrganizationFertilization in VitroInfertility, FemaleFertilization in vitro, HumanFertilization in vitro, Human--Law and legislation