Can a Christian Deny the Virgin Birth?

http://www.christianpost.com/article/editorial/613/section/can.a.christian.deny.the.virgin.birth/1.htm

[The Christian Post] December 22, 2005--Can a true Christian deny the virgin birth? This question would perplex the vast majority of Christians throughout the centuries, but modern denials of biblical truth make the question tragically significant. Of all biblical doctrines, the doctrine of Christ's virginal conception has often been the specific target of modern denial and attack.