Talk:Paper - A Human Embryo of Twenty-seven Pairs of Somites, Embedded in Decidua
From Embryology
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1288995/pdf/janatphys00075-0096.pdf
See also
A very Young Human Embryo found embedded in a "Decidual Cast" of the Uterus
Proc R Soc Med. 1914;7(Obstet Gynaecol Sect):353-7.
Waterston D. PMID 19978039