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The Shettles Method of Sex Selection

By: Alysse Blight | Published: Apr 03, 2019

In the 1960s in the United States Landrum B. Shettles developed the Shettles method, which is a procedure for couples to use prior to and during an…

TechnologySex PreselectionSex PredeterminationFamily PlanningSex Chromosomes

Mesoderm

By: Kate MacCord | Published: Nov 26, 2013

Mesoderm is one of the three germ layers, groups of cells that interact early during the embryonic life of animals and from which organs and tissues…

MesodermGastrulationCell differentiationCellsTissues

Mechanistic Realization of the Turtle Shell

By: Guido Caniglia | Published: Oct 10, 2011

Turtle morphology is unlike that of any other vertebrate. The uniqueness of the turtle's bodyplan is attributed to the manner in which the turtle's…

TurtlesEvolutionMorphology

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

Zidovudine or Azidothymidine (AZT)

By: Chase V. Florez | Published: Jun 30, 2020

In 1964, Jerome Horwitz synthesized the drug zidovudine, commonly abbreviated ZDV, otherwise known as azidothymidine, or AZT, at Wayne State…

AZT (Drug)AzidothymidineHIV-positive menHIV-positive childrenHIV-positive women

Stazione Zoologica Anton Dohrn, Naples, Italy

By: Federica Turriziani Colonna | Published: Dec 22, 2014

The Stazione Zoologica Anton Dohrn (Anton Dohrn Zoological Station) is a public research institute focusing on biology and biodiversity. Hereafter…

OrganizationStazione zoologica di NapoliDevelopmental BiologyZoologyEmbryology

Amniocentesis Prior to 1980

By: Kristin Kelley | Published: Sep 02, 2010

The extraembryonic membranes that surround and originate from the embryos of vertebrates such as birds, reptiles, and mammals are crucial to their…

AmniocentesisReproductionFetus

The Game of Life, by John Horton Conway

By: Julia Damerow | Published: Jun 24, 2010

The Game of Life, or just Life, is a one-person game that was created by the English mathematician John Horton Conway in the late 1960s. It is a…

games

Chemical Induction

By: Adam R. Navis | Published: Oct 30, 2007

Research in chemical induction seeks to identify the compound or compounds responsible for differentiation in a developing embryo. Soren Lovtrup…

Cell differentiationEmbryosDevelopmental BiologyNotochordWaddington, C. H. (Conrad Hal), 1905-1975

Dennis Lo (1963- )

By: Alexis Abboud | Published: Nov 04, 2014

Dennis Lo, also called Yuk Ming Dennis Lo, is a professor at the Chinese University of Hong Kong in Hong Kong, China. In 1997, Lo discovered fetal…

genetic testingHuman chromosome abnormalities--DiagnosisPrenatal DiagnosisAmniocentesisChorionic Villus Sampling