The victim, who was the eighth of 11 children, was 17-years-old at the time of the first assault.
She gave birth to three children by her father in 2010, 2012 and 2013.
RNZI reports the police summary of facts said the defendant had committed the offences when he was drunk.
The prosecution is recommending a jail sentence of 25 years.
The court will pass sentence on Monday next week.
Source:
RNZI