A father and daughter have been sentenced for incest in the Dunedin District Court on Wednesday.

The 37-year-old man and 23-year-old woman had admitted having a sexual relationship over a number of years.

The latest charges followed the birth of their second child in 2013. The pair had previously been convicted of incest in 2012 after the birth of their first child.

Both were sentenced to two years of intensive supervision, along with psychiatric intervention and counselling. The father was also sentenced to six months community detention.

Judge Kevin Phillips described it as "an extremely difficult sentencing", with both individuals having suffered significant sexual abuse while growing up.

Court documents reveal the man fathered his daughter when he was just 14years old, after entering a sexual relationship with his then 30-year-old foster mother.

The defendants now live in different parts of the South Island and have been ordered to have no contact with each other for two years, including via email or social media.

Newshub.