What are "Canadian values"?  Not having children or having very few children?  The norm in Canada is 1.61 children per family.  

The study in this news article indicates that abortions are most likely in a THIRD pregnancy if the first two surviving children are GIRLS. So there you have it: families with two children of one sex are hoping for a third child of the opposite sex.  Three children, not 1.6 children.