Unfortunately, you can NOT obtain naternity leave benefit:
Are you eligible for EI maternity or parental benefits?
You may be eligible to receive EI maternity or parental benefits if:
•you have paid EI premiums;
•you meet the specific criteria for receiving EI maternity or parental benefits;
•your normal weekly earnings are reduced by more than 40%; and
•you have accumulated at least 600 hours of insurable employment during the qualifying period or, if you are a self-employed fisher, you have earned enough money during the qualifying period.
http://www.servicecanada.gc.ca/eng/ei/types/maternity_parental.shtml#eligible