I actually have a few family there,my sister is there and my husband's siblings as well.
Ok so still assume you are budgeting for your medical bills then for the birth plus you need to ensure that the college is aware and supports your maternity as authorised leave.
These are factors that could be considered in granting a study permit in addition to everything else such as qualifications, relevance of course and prospects for when you return to your home country.
Planning to have a baby in Canada could indicate your intention may not be to return home once you graduate even if that is your intention to return home despite having relatives already in the country.
All you can do is put together an application and see what happens regardless of any personal views expressed on a forum nobody here can predict an outcome and pregnancy alone is probably not a singular reason for any rejection.