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Walter Jakob Gehring (1939-2014)
By: Joe Brinkman
| Published: Dec 22, 2014
Walter Jakob Gehring discovered the homeobox, a DNA segment found in a specific cluster of genes that determine the body plan of animals, plants, and…
Homeobox genesDrosophilaGeneticsGenesGenes, Homeobox
Artificial Parthenogenesis and Fertilization (1913), by Jacques Loeb
By: Karen Wellner
| Published: Jun 15, 2010
Jacques Loeb is best known for his embryological work investigating parthenogenesis in invertebrates. Artificial Parthenogenesis and Fertilization is…
LiteratureParthenogenesisPublicationsFertilization
Edward Drinker Cope's Law of Acceleration of Growth
By: M. Elizabeth Barnes
| Published: Jul 24, 2014
The Law of Acceleration of Growth is a theory proposed by Edward Drinker Cope in the US during the nineteenth century. Cope developed it in an…
developmentEvolutionCope, E. D. (Edward Drinker), 1840-1897Growth and Development
Inducing Fertilization and Development in Sand Dollars
By: Karen Wellner
| Published: Jun 24, 2010
Sand dollars are common marine invertebrates in the phylum Echinodermata and share the same class (Echinoidea) as sea urchins. They have served as…
Sand DollarsFertilizationInvertebrates
Studies of Thalidomide's Effects on Rodent Embryos from 1962-2008
By: Joanna Yang, Chanapa Tantibanchachai
| Published: Mar 07, 2014
Thalidomide is a sedative drug introduced to European markets on 1 October 1957 after extensive testing on rodent embryos to ensure its safety. Early…
ContextTeratogenicity testingAbnormalities, HumanThalidomide--Side effectsThalidomide
The Effects of Bisphenol A on Embryonic Development
By: Tristan Cooper-Roth
| Published: Sep 07, 2010
Bisphenol A (BPA) is an organic compound that was first synthesized by Aleksandr Dianin, a Russian chemist from St. Petersburg, in 1891. The chemical…
bisphenol AReproductionHormonesHuman Development
“Effect of Vaginal Sildenafil on the Outcome of In Vitro Fertilization (IVF) After Multiple IVF Failures Attributed to Poor Endometrial Development” (2002), by Geoffrey Sher and Jeffrey Fisch
By: Alison Lane
| Published: Dec 22, 2020
Researchers Geoffrey Sher and Jeffrey Fisch gave Viagra, also known as sildenafil, to women undergoing fertility treatment to test whether the…
Fertility clinicsFertility, HumanHuman embryo--TransplantationEmbryo TransferSildenafil Citrate
Etienne Geoffroy Saint-Hilaire (1772-1844)
By: Valerie Racine
| Published: Aug 05, 2013
Etienne Geoffroy Saint-Hilaire, commonly known as Geoffroy, studied animals, their anatomy and their embryos, and teratogens at the National Museum…
Geoffroy Saint-Hilaire, Etienne, 1772-1844TeratologyZoologyFrench RevolutionHomology theory
The Y-Chromosome in Animals
By: Dorothy R. Haskett
| Published: May 28, 2015
The Y-chromosome is one of a pair of chromosomes that determine the genetic sex of individuals in mammals, some insects, and some plants. In the…
Y ChromosomeSex ChromosomesEmbryosDNAChromosomes
De Formatione Ovi et Pulli (1621), by Girolamo Fabrici
By: Hilary Gilson
| Published: Sep 30, 2008
The embryological treatise De formatione ovi et pulli (On the Formation of the Egg and of the Chick) was written by anatomist and embryologist…
LiteraturePublicationsOvaAnatomy