Primordial germ cell is derived from which of the following embronic layer ?
The primordial germ cells develop within the epiblast or the primary ectoderm and migrate to endoderm of the yolk sac wall.Ref: Gray's anatomy: the anatomical basis of clinical practice, Henry Gray, 39th Edition, Page 196, 1385; Fetal Medicine: Basic Science and Clinical Practice, Charles H, Main J. Whittle, 2nd Edition, Chapter 1, Page 4.
Ectoderm
Mesoderm
Endoderm
Mesodermal sinus