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In 1951 Viktor Hamburger and Howard Hamilton created an embryonic staging series from a combination of photographs and drawings from other…
ChicksPost-coital oral emergency contraception is used for the prevention of pregnancy after intercourse. The contraception comes in the form of pills,…
Emergency ContraceptivesContraceptives, PostcoitalReproductionContraceptionAnatomical models have always been a mainstay of descriptive embryology. As the training of embryologists grew in the late 1800s, so too did the need…
TechnologyModelsEducationIn humans, sex determination is the process that determines the biological sex of an offspring and, as a result, the sexual characteristics that they…
Sex DeterminationGenetic sex determinationIntersex peopleDiscrimination against intersex peopleStevens, N. M. (Nettie Maria), 1861-1912De ovi mammalium et hominis genesi (On the Genesis of the Ovum of Mammals and of Men) is an 1827 pamphlet by Karl Ernst von Baer about the anatomical…
LiteratureBaer, Karl Ernst von, 1792-1876developmentAnatomy, ComparativeGerm CellsIn eighteenth century Germany, Johann Friedrich Blumenbach studied how individuals within a species vary, and to explain such variations, he proposed…
AnthropologyAnatomy, ComparativeVariation (Biology)EmbryosDevelopmental BiologyHans Adolf Eduard Driesch was a late-nineteenth and early-twentieth century philosopher and developmental biologist. In the spring of 1891 Driesch…
ExperimentsPublicationsSea UrchinsThe Edinburgh Mouse Atlas, also called the e-Mouse Atlas Project (EMAP), is an online resource comprised of the e-Mouse Atlas (EMA), a detailed…
TechnologyEmbryosDatabases, GeneticdevelopmentGene ExpressionThe review article “Cell Deaths in Normal Vertebrate Ontogeny” (abbreviated as “Cell Deaths”) was published in Biological Reviews of the Cambridge…
LiteratureCell DeathPublicationsVertebratesOntogenyTwo main elements characterize the skeletal morphology of turtles: the carapace and the plastron. For a turtle, the carapacial ridge begins in the…
TurtlesMorphology (Animals)EmbryosGerm CellsEmbryology