NSW Parliament has passed a bill decriminalising abortion, overturning a 119-year-old law and achieving what advocates say is a “massive step forward for women” in the state.

The Abortion Law Reform Act 2019, which cleared the final legislative hurdle on Thursday morning after a marathon debate in both houses, allows terminations up to 22 weeks’ and later abortions if two doctors considering all the circumstances agree a termination is necessary.

It also removes a century-old statute from the state’s criminal code that treats abortion as an offence carrying penalties of up to 10 years’ imprisonment.

Members of both major parties were granted a conscience vote on the bill. It passed the Lower House on the voices with no division.