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Teratogens
By: Chanapa Tantibanchachai
| Published: Jan 22, 2014
Teratogens are substances that may produce physical or functional defects in the human embryo or fetus after the pregnant woman is exposed to the…
Abnormalities, HumanFetusPregnancyTeratogenicity testingEmbryos
Johann Friedrich Blumenbach (1752-1840)
By: Kate MacCord
| Published: Jan 22, 2014
In eighteenth century Germany, Johann Friedrich Blumenbach studied how individuals within a species vary, and to explain such variations, he proposed…
AnthropologyAnatomy, ComparativeVariation (Biology)EmbryosDevelopmental Biology
Studies in Spermatogenesis (1905), by Nettie Maria Stevens
By: Troy Cox
| Published: Jan 22, 2014
Studies in Spermatogenesis is a two volume book written by Nettie Maria Stevens, and published by the Carnegie Institution of Washington in 1905 and…
LiteratureSpermatogenesisGenetic sex determinationSex DifferentiationEmbryos
"Genetic Evidence Equating SRY and the Testis-Determining Factor" (1990), by Phillippe Berta et al.
By: Troy Cox
| Published: Jan 10, 2014
In the late 1980s, Peter Goodfellow in London, UK led a team of researchers who showed that the SRY gene in humans codes a protein that causes testes…
TestisY ChromosomeEmbryosChromosomesSex Chromosomes
Congenital Rubella Syndrome (CRS)
By: Erica O'Neil
| Published: Jan 10, 2014
Congenital rubella syndrome (CRS) can occur in children whose mothers contracted the rubella virus, sometimes called German measles, during pregnancy…
RubellaRubella in pregnancyRubella virusPregnancyEmbryos
"Developmental Effects of Endocrine-Disrupting Chemicals in Wildlife and Humans" (1993), by Theo Colborn, Frederick S. vom Saal, and Ana M. Soto
By: Jennifer R. Craer
| Published: Jan 10, 2014
Developmental Effects of Endocrine-Disrupting Chemicals in Wildlife and Humans, was published in 1993 in Environmental Health Perspectives. In the…
LiteratureEndocrine disrupting chemicalsEmbryologyfetal developmentendocrine disruptors
"Screening for Congenital Hypothyroidism" (1991), by Delbert A. Fisher
By: Jennifer R. Craer
| Published: Dec 31, 2013
In his 1991 article Screening for Congenital Hypothyroidism, Delbert A. Fisher in the US reported on the implementation and impact of mass neonatal…
LiteratureCongenital HypothyroidismNewborn infants--DevelopmentCretinismInfant Health Services
"Congenital Cataract following German Measles in the Mother" (1941), by Norman McAlister Gregg
By: Lindsey O'Connell
| Published: Dec 31, 2013
In Australia in the 1940s, Norman McAlister Gregg observed a connection between pregnant women who contracted the rubella virus, or German measles,…
LiteratureCataract in childrenRubellaRubella in pregnancyRubella virus
Sex-determining Region Y in Mammals
By: Troy Cox
| Published: Dec 31, 2013
The Sex-determining Region Y (Sry in mammals but SRY in humans) is a gene found on Y chromosomes that leads to the development of male phenotypes,…
Y ChromosomeTestisEmbryosChromosomesSex Chromosomes
"The Cell-Theory" (1853), by Thomas Henry Huxley
By: Samantha Hauserman
| Published: Dec 12, 2013
The Cell-Theory was written by Thomas Henry Huxley in Britain and published in 1853 by The British and Foreign Medico-Chirurgical Review. The twenty-…
LiteratureEpigeneticsEmbryologyHuxley, Thomas Henry, 1825-1895Cellular control mechanisms