if making kids and getting easy PR is your goal then read following posts
http://www.canadavisa.com/canada-immigration-discussion-board/urgent-please-international-students-pregnant-issue-t180063.0.html;msg3339677#msg3339677
http://www.canadavisa.com/canada-immigration-discussion-board/international-student-giving-birth-t214838.0.html;msg3339671#msg3339671
if not then best of luck
TY