Honestly sis, kahit temporary pa lang ang SSS number mo, as long as you're paying regularly and on record, dapat okay lang yan para sa maternity loan application, maraming friends ko na ganyan pa lang status nila when they applied and na-approve naman. Pero best call pa rin ang SSS directly or sa nearest branch mo para ma-confirm, kasi bawat case may slight differences pa, at gusto mo sure na walang hassle when you file. Good thing you're planning ahead na!