Catholics are not to circumcise:
http://www.catholicsagainstcircumcision.org/
Catholic Teachings on Circumcision (Printable Pamphlet) http://www.catholicsagainstcircumcision.org/Catholic_Brochure.pdf
The Morality of Circumcision According to the Catholic Church:
http://www.drmomma.org/2010/03/morality-of-circumcision-according-to.html
http://www.catholicsagainstcircumcision.org/
Catholic Teachings on Circumcision (Printable Pamphlet) http://www.catholicsagainstcircumcision.org/Catholic_Brochure.pdf
The Morality of Circumcision According to the Catholic Church:
http://www.drmomma.org/2010/03/morality-of-circumcision-according-to.html