A new law giving legal rights to a foetus may be again debated in New South Wales State Parliament, sparking protest from supporters and detractors.

Christian Democratic Party MP Reverend Fred Nile is set to make another push at passing the bill colloquially known as Zoe’s law.

Abortions in New South Wales are only considered lawful if a doctor deems the woman's physical or mental health is in danger, with the state the last in Australia where abortion is still technically a crime.