How to induce labor?

Katrina Rose • Having a baby with the most amazing man on this earth. Been together 5 years! Due February 16th 2017. Our first baby .

Baby measuring 40weeks my sister is only 34 weeks. She's dilated to 1/2 cm as of yesterday. She's trying to get her labor going so the baby don't get any bigger cuz if he does she will need a c section. He weights 7.4 oz.

Any ideas on how to get it going. Some that you know work?