Data groupings and classification as Major or Minor Abnormalities are based on that used by the Australian Institute of Health and Welfare National Perinatal Statistics Unit, UNSW and published in Congenital Malformations Australia 1981-92.
For individual systems, data shown as a % of all Major Abnormalities based upon published statistics using the same groupings as CMA 81-92. Please note that some congenital diseases involve more than one system.
Reference: Original Data source for graphs from Congenital Malformations Australia 1981-1992, P. Lancaster and E. Pedisich, ISSN 1321-8352.
The classification groups for Major and Minor Abnormalities are also shown.
You should look at normal development. Development Notes
Alternatively, go on to look at Systematic Development of organs and tissues.
This quick link is to the abnormal development page for each system.