Prime Minister Jacinda Ardern will take back reins on Thursday

Prime Minister Jacinda Ardern will return to her full duties later this week, when Acting Prime Minister and Foreign Affairs Minister Winston Peters leaves the country.

Mr Peters will leave the country for at midnight on Wednesday, for the Association of Southeast Asian Nations (ASEAN) forum in Singapore.

At that point, Ms Ardern will take over as Prime Minister, working from Auckland on Thursday and Friday.

On Saturday, she and partner Clarke Gayford and baby Neve Te Aroha Ardern Gayford will move to Wellington to the Prime Ministerial residence at Premier House, Mr Peters announced at his post-Cabinet news conference.

In a Facebook Live on Sunday, Ms Ardern said the family were doing "really well" despite having no routine to speak of.

She thanked her own mother as well as Mr Gayford's, who had spent a couple of weeks helping out after she returned home from hospital.

"What a new appreciation you get for mums after you have your own," she said.

Ms Ardern previously announced she will do one round of interviews with major media outlets close to her return to work due to the high level of interest, and this will be the only formal media opportunity in relation to the new baby.

Newshub.