if she can not do the job because of security, with the certificate of doctor, she can apply to CSST, get 90% net salary until her delivery.
else, with the certificate of doctor, she can apply EI named sickness, maxmume 15 weeks. she also can apply to group insurrance f she has.
after delivery, she has maximum 15 weeks of materity and 30 weeks of parental.
she has right to be off work whenever she has a certificat. call CNT to ask how many days she can be off totally. do not care about the boss.
good luck.