Thanks @legalfalcon . Another question related to this. Do we need to inform IRCC about my wife's pregnancy?That would be at the discretion of the officer.
See See https://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=987&top=4
See https://www.canada.ca/content/dam/ircc/migration/ircc/english/department/partner/pp/pdf/imm5733e.pdf