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Preimplantation genetic diagnosis (PGD) involves testing for specific genetic conditions prior to the implantation of an embryo in the uterine wall.…
TechnologyPreimplantation DiagnosisReproductionFertilizationgenetic testingIn nineteenth century Great Britain, Thomas Henry Huxley proposed connections between the development of organisms and their evolutionary histories,…
PeopleDarwin, Charles, 1809-1882EvolutionpaleontologyEmbryologyIn the nineteenth century, obstetricians in Europe began to construct devices to incubate infants in increasingly controlled environments. The infant…
TechnologyPremature InfantsObstetricsMaternal and infant welfareIncubators (Pediatrics)Curt Jacob Stern studied radiation and chromosomes in humans and fruit flies in the United States during the twentieth century. He researched the…
ChromosomesHeredityMitosisDrosophilaDrosophila melanogasterHydrocephalus is a congenital or acquired disorder characterized by the abnormal accumulation of cerebrospinal fluid within the cavities of the brain…
HydrocephalusDandy, Walter Edward, 1886-1946Arnold-Chiari DeformityBrain--DiseasesInfants--DiseasesStem cells are undifferentiated cells that are capable of dividing for long periods of time and can give rise to specialized cells under particular…
Stem CellsReproductiondifferentiationHuman DevelopmentAs one of the first to work at the Carnegie Institution of Washington Department of Embryology, Warren Harmon Lewis made a number of contributions to…
PeopleBiographyEducationCarnegie Institution of WashingtonThe development of the obstetric ultrasound has allowed physicians and embryologists to obtain a clear picture of the developing human embryo and…
TechnologyUltrasonographyReproductionmedicineHuman DevelopmentIn 2001, David Kimberlin and colleagues published “Natural History of Neonatal Herpes Simplex Virus Infections in Acyclovir Era,” hereafter, “Natural…
Herpes Simplex Virus InfectionAcyclovirHistory of MedicineClinical trialSymptoms in ChildrenSir John Bertrand Gurdon further developed nuclear transplantation, the technique used to clone organisms and to create stem cells, while working in…
Cell nuclei--TransplantationCellsCloningStem CellsEmbryonic Stem Cells