The High Court at Christchurch has heard evidence from Graham Dickason at his wife's murder trial.

Lauren Dickason admits killing their daughters in Timaru in 2021 - a six-year old and two-year-old twins, but she's mounting a defence of insanity and infanticide.

Her husband told the court via audio visual link from South Africa about his wife’s anxiety, depression and struggles with fertility and motherhood.

The Herald's Anna Leask his testimony was extremely distressing.

"He spoke about the harrowing details of coming home that night and finding his three little girls dead in their beds and how he tried to revive them- and the grief he suffered as a result."

LISTEN ABOVE

• Lauren Dickason's husband: 'Something flipped, I didn't see it, now my kids are dead'
• NZ Herald reporter: The jury has to determine whether Dickason intended murder
• Woman charged with murdering her three daughters set to appear before High Court judge today