Embryology quote of the week

"the term conception refers to the union of the male and female pronuclear elements of procreation from which a new living being develops. It is synonymous with the terms fecundation, impregnation and fertilization ... The zygote thus formed represents the beginning of a new life." (J.P. Greenhill and E.A. Freidman. Biological Principles and Modern Practice of Obstetrics. Philadelphia: W.B. Saunders Publishers, pages 17 and 23.)