Well i advise against this strongly, because first of all it will be very expensive for you to have your birth here if you are not covered by any health insurance. Secondly, most hospitals may deny accepting your wife as a patient because you have lack of insurance and they don't want to take risks if you decide to pay cash during your stay. Lastly, not all pregnancies will go smoothly. How are you going to cover if something happens to your wife and the baby?
Unless you are really rich and can afford over 1 million dollars of medical care then by all means go ahead but this is not a feasible plan as IRCC keep records of entry by all foreign visitors so your chances of visiting Canada in the future will be difficult if they find out that you are doing this.