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Alfred Henry Sturtevant studied heredity in fruit flies in the US throughout the twentieth century. From 1910 to 1928, Sturtevant worked in Thomas…
DrosophilaHeredityInheritance of acquired charactersColumbia University--Graduate studentsMutationEdgar Allen identified and outlined the role of female sex hormones and discovered estrogen in the early 1900s in the US. In 1923, Allen, through his…
EstrogenHormones, SexOogenesisEstrusMenstrual CycleWilhelm His, Sr. was born on 9 July 1831 in Basel, Switzerland, to Katharina La Roche and Eduard His. He began his medical studies at Basel in 1849…
PeopleBiographyHuman DevelopmentTwin-to-Twin Transfusion Syndrome (TTTS) is a rare placental disease that can occur at any time during pregnancy involving identical twins. TTTS…
Fetofetal TransfusionReproductionFetusCongenital DisordersHuman DevelopmentNuclear magnetic resonance imaging (MRI) is a technique to create a three-dimensional image of a fetus. Doctors often use MRIs to image a fetuses…
TechnologyMagnetic resonance imagingNuclear Magnetic ResonanceFetusDiagnostic ultrasonic imagingEpidermal growth factor is a signaling molecule that stimulates the growth of epidermal tissues during development and throughout life. Stanley Cohen…
Levi-Montalcini, RitaHamburger, Viktor, 1900-2001EmbryologyEmbryosDevelopmental BiologyJacques Loeb experimented on embryos in Europe and the United States at the end of the nineteenth and beginning of the twentieth centuries. Among…
PeopleParthenogenesisBiographyTheodora Colborn studied how chemicals affect organisms as they develop and reproduce during the twentieth and twenty first centuries in the US. By…
endocrine disruptorsEndocrine disrupting chemicalsPollutantsEndocrine toxicologyEndocrine SystemAssisted reproductive technologies (ART) are a collection of different techniques designed to help those who are infertile achieve a successful…
TechnologyReproductive Techniques, AssistedReproductionFertilizationIn 1995 and 1996, researchers at the Roslin Institute in Edinburgh, Scotland, cloned mammals for the first time. Keith Campbell, Jim McWhir, William…
CloningClone CellsCloning, MolecularCloning, OrganismExperiments