Human fetus abdomen stained section showing general structures
Image details
Contributor:
Scenics & Science / Alamy Stock PhotoImage ID:
EA9ABNFile size:
51.5 MB (4.6 MB Compressed download)Releases:
Model - no | Property - noDo I need a release?Dimensions:
3635 x 4951 px | 30.8 x 41.9 cm | 12.1 x 16.5 inches | 300dpiDate taken:
30 October 2014More information:
In humans, the fetal stage of prenatal development may be defined as beginning at the eleventh week in gestational age, which is the ninth week after fertilization. In biological terms, however, prenatal development is a continuum, with no clear defining feature distinguishing an embryo from a fetus. The use of the term "fetus" generally implies that a mammalian embryo has developed to the point of being recognizable as belonging to its own species, and this is usually taken to be the 9th week after fertilization. A fetus is also characterized by the presence of all the major body organs, though they will not yet be fully developed and functional, and may not all be situated in their final anatomical location.