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Twin-to-Twin Transfusion Syndrome
By: Corinne DeRuiter
| Published: Aug 16, 2011
Twin-to-Twin Transfusion Syndrome (TTTS) is a rare placental disease that can occur at any time during pregnancy involving identical twins. TTTS…
Fetofetal TransfusionReproductionFetusCongenital DisordersHuman Development
Parasitic Twins
By: Corinne DeRuiter
| Published: Aug 16, 2011
Parasitic twins, a specific type of conjoined twins, occurs when one twin ceases development during gestation and becomes vestigial to the fully…
Twins, ConjoinedReproductionFetusCongenital DisordersHuman Development
Trisomy 18 (Edwards Syndrome)
By: Mark Zhang
| Published: Aug 16, 2011
John Hilton Edwards first described the symptoms of the genetic disorder known as Trisomy 18 - one of the most common forms of trisomy, which occurs…
TrisomyFetusCongenital DisordersHuman Development
Gastrulation in Gallus gallus (Domestic Chicken)
By: Corinne DeRuiter, Maria Doty
| Published: Jun 21, 2011
Gastrulation is an early stage in embryo development in which the blastula reorganizes into three germ layers: the ectoderm, the mesoderm, and the…
GastrulationChicks
Hensen's Node
By: Maria Doty, Corinne DeRuiter
| Published: Jun 21, 2011
A node, or primitive knot, is an enlarged group of cells located in the anterior portion of the primitive streak in a developing gastrula. The node…
GastrulationChicks
Robert Geoffrey Edwards (1925-2013)
By: Samuel Philbrick
| Published: Jun 20, 2011
Robert Geoffrey Edwards worked with Patrick Christopher Steptoe to develop in-vitro fertilization (IVF) techniques during the 1960s and 1970s in the…
PeopleFertilization in VitroReproductionBiographyFertilization
Nuclear Transplantation
By: Sean Cohmer
| Published: Jun 14, 2011
Nuclear transplantation is a method in which the nucleus of a donor cell is relocated to a target cell that has had its nucleus removed (enucleated…
Cell nuclei--TransplantationNuclear Transplantation
"Developmental Capacity of Nuclei Transplanted from Keratinized Skin Cells of Adult Frogs" (1975), by John Gurdon, Ronald Laskey, and O. Raymond Reeves
By: Sean Cohmer
| Published: Jun 14, 2011
In 1975 John Gurdon, Ronald Laskey, and O. Raymond Reeves published "Developmental Capacity of Nuclei Transplanted from Keratinized Skin Cells of…
Nuclear Transfer TechniquesExperimentsPublicationsFrogsNuclear Transplantation
August Antonius Rauber (1841-1917)
By: Maria Doty
| Published: Jun 10, 2011
August Antonius Rauber was an embryologist and anatomist who examined gastrulation in avian embryos. He examined the formation of the blastopore,…
PeopleGastrulationChicks
Hamburger-Hamilton Staging Series (1951)
By: Maria Doty
| Published: Jun 10, 2011
In 1951 Viktor Hamburger and Howard Hamilton created an embryonic staging series from a combination of photographs and drawings from other…
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