A man charged with murder after a woman was found dead with stab wounds in a NSW home has been revealed to be her son. 

Emergency services found the woman, aged in her 40s, at a property on Merrigum Street in Windale, Lake Macquarie, after 8pm on Saturday.

Police had been responding to reports of a concern for welfare.

Paramedics attempted to treat the woman, but she could not be revived.

A 25-year-old man was arrested at the scene and taken to Belmont Police Station where he was charged with murder (DV).

He was refused bail and will appear in court on Sunday. 

NSW Police confirmed on Sunday the man and woman were related to each other.

Superintendent Tracy Chapman said the woman was found with stab wounds to her face and body.

A woman has died after an alleged stabbing north of Sydney on Saturday night

The man was seen sitting on the ground before being taken to hospital

Police seized a knife from the scene.  

‘That will undergo forensic examination,’ Superintendent Chapman said.

Superintendent Chapman described domestic violence as a ‘scourge on society’.