Paramedics were called to help police on Wednesday night, after a car pulled in to a booze bus check point with a woman in labour in the front passenger seat.
The Toyota hatch-back back pulled up near the booze bus on Spencer Street about 6.15pm, surprising traffic police.
The two male police officers from Melbourne Highway Patrol soon noticed the woman was in labour and called paramedics.
The male driver and his 35-year-old female partner, both from Werribee, were taken to St Vincent’s Hospital.
The woman was in hospital last night and as of 9pm was yet to deliver the baby.