Origin: Anc Greek έμβρυον/embryon(something in an early stage of development and for vertebrate before the birth)
> εν/en(=in and by Homer to be) + βρύω (=spurt, germinate)
+λογoς/logos(=speech, study of)
The branch of biology which is about the process by which organisms grow and develop and particularly for human embryology concerns the development of an embryo from the fertilization to the fetus age (about 8 weeks). In the modern sense embryology tends to be the study of the developmental aspects of life as a whole and not just the first eight weeks.