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A History of Embryology (1959), by Joseph Needham
By: Karen Wellner
| Published: Jun 28, 2010
In 1931 embryologist and historian Joseph Needham published a well-received three-volume treatise titled Chemical Embryology. The first four chapters…
LiteratureNeedham, Joseph, 1900-1995Publicationshistory
Edgar Allen and Edward A. Doisy's Extraction of Estrogen from Ovarian Follicles, (1923)
By: Brendan Van Iten
| Published: Mar 02, 2017
In the early 1920s, researchers Edgar Allen and Edward Adelbert Doisy conducted an experiment that demonstrated that ovarian follicles, which produce…
OvariesCorpus LuteumEndometriumEstrogenHormones, Sex
Neonatal Jaundice
By: Arianna Bradley
| Published: Feb 23, 2017
Neonatal jaundice is the yellow discoloration of the skin and eyes due to elevated bilirubin levels in the bloodstream of a newborn. Bilirubin is a…
Jaundice, NeonatalHyperbilirubinemia, NeonatalErythroblastosis FetalisPhototherapyChildren's Hospital Medical Center (Boston, Mass.)
Richard Woltereck (1877-1944)
By: B. R. Erick Peirson
| Published: May 13, 2012
Richard Woltereck was a German zoologist and hydrobiologist who studied aquatic animals and extended the concept of Reaktionsnorm (norm of reaction)…
PeopleEvolutionHeredityEmbryologyAquatic animals
Somatic Cell Nuclear Transfer in Mammals (1938-2013)
By: Zane Bartlett
| Published: Nov 04, 2014
In the second half of the twentieth century, scientists learned how to clone organisms in some species of mammals. Scientists have applied somatic…
CloningCell nuclei--TransplantationSpemann, Hans, 1869-1941Genetic Engineering
Organisers and Genes (1940), by Conrad Hal Waddington
By: Adam R. Navis
| Published: Oct 30, 2007
Conrad Hal Waddington's Organisers and Genes, published in 1940, is a summary of available research and theoretical framework for many concepts…
LiteratureOrganizers, EmbryonicPublicationsdifferentiation
August Friedrich Leopold Weismann (1834-1914)
By: Yawen Zou
| Published: May 23, 2014
August Friedrich Leopold Weismann studied how the traits of organisms developed and evolved in a variety of organisms, mostly insects and aquatic…
Germ CellsHeredity
"Predictors of Postpartum Depression: An Update” (2001), by Cheryl Tatano Beck
By: Cecilia Chou
| Published: Sep 14, 2017
In her 2001 paper “Predictors of Postpartum Depression: An Update,” researcher Cheryl Tatano Beck presents the most common risk factors associated…
LiteraturePostpartum DepressionPregnancyPostnatal DepressionDepression, Mental
Dinosaur Egg Parataxonomy
By: Madison Paige
| Published: Mar 23, 2015
Dinosaur egg parataxonomy is a classification system that organizes dinosaur eggs by descriptive features such as shape, size, and shell thickness.…
DinosaursDinosaurs--EggsPaleobiologyFossilsEmbryos
Understanding and Treating Gonorrhea from the Eighteenth Century to the Twenty-First Century
By: Eboni E. Andersun
| Published: Jul 08, 2024
Gonorrhea is a sexually transmitted disease, or STD, caused by the bacterium Neisseria gonorrhoeae. Common symptoms of the disease include painful…
GonorrheaNeisseria gonorrhoeaeUrinationSyphilisPelvic Inflammatory Disease