An 11-month-old baby boy remains in a critical condition in Starship hospital, seven days after being hit by a SUV in Pukehina.

His mother, 33, who was also hit, is in a stable condition at Tauranga Hospital and the 2-year old girl was discharged last week from Waikato Hospital.

The woman was pushing her children in a stroller on the side of Otamarakau Valley Rd in Pukehina last Monday when they were hit by an SUV towing a trailer, which veered off the road.

The "freak accident" tossed the mum and her children through the air onto the road.

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Read more: SUV driver in Otamarakau Valley Rd crash in Pukehina 'a good guy, he'll be hurting'

Rescuers describe finding a wrecked pushchair on the side of the road and a mother so badly injured she could not reach her children.

A Givealittle page set up for the family has raised $20,760 as of this morning.

The money was to go to travel costs between hospitals and to help the family face the long road to recovery.