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“Explaining Recent Declines in Adolescent Pregnancy in the United States: The Contribution of Abstinence and Improved Contraceptive Use” (2007), by John S. Santelli, Laura Duberstein Lindberg, Lawrence B. Finer, and Susheela Singh
By: Rohini Nott
| Published: Feb 15, 2021
In “Explaining Recent Declines in Adolescent Pregnancy in the United States: The Contribution of Abstinence and Improved Contraceptive Use,”…
LiteraturePregnancy, AdolescentBirth ControlFirst pregnancyReproductive Health
“A Two-Factor Hypothesis of Freezing Injury: Evidence from Chinese Hamster Tissue-Culture Cells” (1972), by Peter Mazur, Stanley Leibo, and Ernest Chu
By: Risa Aria Schnebly
| Published: Mar 02, 2021
In 1972, Peter Mazur, Stanley Leibo, and Ernest Chu published, “A Two-Factor Hypothesis of Freezing Injury: Evidence from Chinese Hamster Tissue-…
LiteratureCryonicsCryosurgeryMedicine--History--20th centuryOsmosis
Neural Crest
By: M. Elizabeth Barnes
| Published: Sep 15, 2014
Early in the process of development, vertebrate embryos develop a fold on the neural plate where the neural and epidermal ectoderms meet, called the…
VertebratesdevelopmentGerm LayersNeural CrestNeural Crest Cells
Endoderm
By: Kate MacCord
| Published: Nov 17, 2013
Endoderm is one of the germ layers-- aggregates of cells that organize early during embryonic life and from which all organs and tissues develop.…
GastrulationEmbryosEmbryologyCellsTissues
Diethylstilbestrol (DES) in the US
By: Alexis Abboud
| Published: Mar 23, 2015
Diethylstilbestrol (DES) is an artificially created hormone first synthesized in the late 1930s. Doctors widely prescribed DES first to pregnant…
DiethylstilbestrolDiethylstilbestrol--Side effectsDiethylstilbestrol--CarcinogenicityPregnancyEstrogen
Charles Darwin's Theory of Pangenesis
By: Yawen Zou
| Published: Jul 20, 2014
In 1868 in England, Charles Darwin proposed his pangenesis theory to describe the units of inheritance between parents and offspring and the…
HeredityDarwin, Charles, 1809-1882ReproductionEvolutionNatural selection
“A Sex Chromosome Anomaly in a Case of Gonadal Dysgenesis (Turner’s Syndrome)” (1959), by Charles Edmund Ford, K. W Jones, Paul E. Polani, J. C De Almeida, and J. H Briggs
By: Megha Pillai
| Published: Aug 06, 2024
In 1959, Charles Edmund Ford and colleagues published “A Sex Chromosome Anomaly in a Case of Gonadal Dysgenesis (Turner’s Syndrome),” hereafter “A…
Turner SyndromeGonadal DysgenesisGonadal Dysgenesis, XOGonadal Dysgenesis, 45, XAbnormalities, Sex Chromosome
Aristotle (384-322 BCE)
By: Dorothy Regan Haskett, Valerie Racine, Joanna Yang
| Published: Jul 07, 2016
Aristotle studied developing organisms, among other things, in ancient Greece, and his writings shaped Western philosophy and natural science for…
GreecedevelopmentphilosophyPlatoPhysics
"Mitochondrial DNA and Human Evolution" (1987), by Rebecca Louise Cann, Mark Stoneking, and Allan Charles Wilson
By: Dorothy R. Haskett
| Published: Oct 10, 2014
In 1987 Rebecca Louise Cann, Mark Stoneking, and Allan Charles Wilson published Mitochondrial DNA and Human Evolution in the journal Nature. The…
LiteratureMitochondriaHuman EvolutionEvolutionHomo sapiens