The Pull-thru Network 
Non-profit support and resource organization for families of children born with imperforate anus, cloaca, Hirschsprung's Disease and any of the associated defects.
http://www.pullthrough.org/Imperforate Anus
Information page including definitions, from Texas Pediatric Surgical Associates
http://www.pedisurg.com/PtEduc/Imperforate_Anus.htm
Imperforate Anus Repair
Definition of and about anorectal malformations and treatments.
http://www.nlm.nih.gov/medlineplus/ency/article/002926.htm
Anorectal Malformations
Colorectal Center surgeons at Cincinnati Children's Hospital Medical Center, provide information on anorectal malformations for families and health professionals.
http://www.cincinnatichildrens.org/svc/alpha/c/colorectal/imperforate-anus/
