You should inform them that you're expecting a newborn on November 2011 thru email.
You just need to inform them thru email about the birth of your child. They will ask for additional documents for your newborn. They would require a original birth certificate, passport copy, pictures & updated application forms (IMM008 generic & addl' information form for you & addl information for your spouse/other dependents).
You will send them updated application forms. They will not send you application forms. They will inform you where to download the forms.
You must inform them as soon as you came to know that you're expecting a baby.
On my case, i informed them on Oct 2010 even the baby is due on June 2011. Then emailed them about the birth last june 2011 then they asked for the documents of the baby then they sent MR after 2 weeks. After than we had the medical and now waiting for the PPR.
Hope this helps. God Bless!
Congratulations on the Newborn!
BM