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A Kiwi horror film that shows an unconscious girl being raped by a man wearing a pig's head should be banned, say family values campaigners.

Wound is described by its creators as a "shocking supernatural tale of mental illness, bondage, incest, revenge and explicit graphic violence".

It features disturbing scenes including a pregnant woman being hit on the stomach with a bat to induce a miscarriage.

Wound is due to premiere at the New Zealand Film Festival in July if approved for release by the chief censor Bill Hastings.

But it has enraged anti-violence campaigners who say it could incite copycat attacks.

Family First national director Bob McCoskrie said: "Research clearly shows that explicit sexual content of this nature contributes to an increase in sexual violence.

"I can't see how incest and graphic violence can be presented in an entertaining way."

Director David Blyth defended the use of graphic violence, saying it was a social commentary on New Zealand.

"It's about sexual abuse in this country, no one else is talking about this.

"All my films have had a female theme and they all deal with the disenfranchised. I think it's important to find a place for movies of all kinds, and not just what the Film Commission approves."