You must inform CIC about your marriage immediately. otherwise your visa will be invalid and you have to start process again from the beginning.
When I applied for permanent residence I was single. I have received my visa, but now I am married. Can I go to Canada and sponsor my spouse later?
No, your visa is not valid if it does not accurately reflect your legal status and you will not be permitted to enter Canada. You must inform us immediately, in writing, of your new matrimonial status. If your spouse is not a citizen or permanent resident of Canada, he or she must be examined in the context of your application, whether or not he or she will accompany you to Canada. We will send you the forms which your spouse must complete as well as a list of documents required. He or she will have to undergo a medical examination. If your spouse is is accompanying you to Canada, you will also have to pay the required fees and submit a copy of his or her passport. If your destination is in the province of Quebec, your spouse must also obtain a Certificat de sélection du Québec (CSQ).
You MUST return your visa and Confirmation of Permanent Residence forms to our office for cancellation. Once your spouse has been examined, unless he or she is inadmissible, we will issue the visa(s).
Any current family member not examined in this application can NEVER be sponsored by you in the future. Misrepresenting or withholding information would render you inadmissible to Canada.
Since I received my permanent residence visa, my spouse has had a baby. Can I go to Canada and sponsor my child later?
No, unless your child is a Canadian citizen, your visa is invalid because you have a new family member who has not been examined and you will not be permitted to enter Canada. If your child was born in Canada or if one of its parents is a Canadian citizen, the child is therefore a Canadian citizen. If that is not the case, you must add the child to your application by sending us a copy of the birth certificate along with 7 identity photos. Your child will have to undergo a medical examination. If the child is accompanying you to Canada, you will also have to pay the required fees and submit a copy of the passport used for the child. If your destination is in the province of Quebec, you must also obtain a Certificat de sélection du Québec (CSQ) for your child.
You MUST also return your visas and Confirmation of Permanent Residence forms to our office for cancellation. Once your child has been examined, unless he or she is inadmissible, we will issue the visa(s).
Any current family member not examined now can NEVER be sponsored by you in the future. Misrepresenting or withholding information would render you inadmissible to Canada.
Read below threads
http://www.canadainternational.gc.ca/france/visas/immigrate-immigrer_faq.aspx?lang=eng#after
http://www.canadavisa.com/canada-immigration-discussion-board/approved-pr-got-cancelled-t60844.0.html