Hi Can_Indian, thanks for clarifying olak131's comments. I got worried that I would need the passport too, but your comments makes sense to me and gives peace of mind.Yes, You only need birth certificate for Canadian born baby. Passport is not compulsory for them.
You can enter birth registration number as a national identity document #.
You can duplicate birth certificate in all the baby's document upload, if you don't have a passport for your new born Canadian baby.
Wait for the birth certificate before submitting your application.
We are waiting for our canadian baby birth to be ready...
Thanks again folks!