Once a baby is born via surrogacy in Canadian territory, it is very important to take all the necessary legal steps in order for the IPs to be declared the legal parents of the child. As long as you have established the rights and obligations of each party in the surrogacy agreement and work with an experienced attorney, there's no reason why the surrogate should keep the baby following birth.
Read the full article on: Is Surrogacy Legal in Canada? – Regulations, Process & Cost ( 43).