Premium is the monthly "rate" you have to pay. The premium depends on the income.
---> http://www2.gov.bc.ca/gov/content/health/health-drug-coverage/msp/bc-residents/premiums
Leon is right, I also know someone who had to pay back what was oovered by BC MSP. She had been in BCfor about 4 years and left to visit her mom. Since you're supposed to tell BC MSP when you plan on leaving she did let them know and later on she was billed quite a bit because she didn't meet the requirements.
You should look up all the information given on their website:
http://www2.gov.bc.ca/gov/content/health/health-drug-coverage/msp
And people should think about one important thing: The folks of BC have to pay for fraud comitted by some ignorant people!
Yes, costs for Premiums go up almost every year but one reason is fraud!
As far as I know Alberta health care is still "free". BUT Alberta got approx. 60.000 (maybe even more!) unemployed workers just from the energy sector. So despite all the usual issues every Province has to deal with, Alberta has to deal with a really tough tragedy and does not need people who want to move there just because health care doesn't cost anything (which isn't true anyway).
Another option could be to give birth in your home country. Might be easier since you know your way around back home.
Good luck!