The canadian immigration office in sydney strongly advised me not to make any change to my family configuration subsequent to receiving my visa and prior to being granted Permanent Residence status in canada.

I did follow their advice and I am here in Canada without my future wife. She is now 4 months pregnant and we plan to get married soon. Please advice me on options available to get them (wife and baby)over to Canada. the baby is due to be born in May next year.

If she is not granted admission as a visitor, you will have to submit an undertaking for sponsorship in the Family Class, which would be concluded overseas.