Evening Primrose Oil Success Stories ??

So.. I’ve started EPO pills vaginally as of 37 weeks.. trying to avoid having to be induced at 39 weeks. Is there anyone.. who has tried these & they worked as far as further softening & effacing the cervix ? My sister swears by them & suggests 6 capsules vaginally. 3 in the day, 3 at night. Seems a bit much but she did have her baby within 4-5 days of using this dosage. She also was trying to avoid having a scheduled c section.. she had a successful VBAC FYI at 38 weeks & 6 days.