"According po kay Dr. Kristen Cruz-Canlas from our #AskDok Live chat session: ""1.) here are the signs po ng active labor: regular na paninigas ng tyan, lasting for 30-70 seconds, hindi po nawawala kahit magpahinga,/ mahiga, nagraradiate sa likod at harap ng tyan, pwedeng may vaginal bleeding or watery discharge po. need po pumunta sa hospital pag in active labor po 2.) cervical ripening agent po ang Evening primrose oil(Naturalle/ Eveprim brand) may mga studies po na nakaka lambot po sya ng cervix natin, hence nakakahelp daw po bumuka but it wont guarantee vaginal delivery po. Case to case basis po kasi ang successful vaginal delivery based po sa 3 Ps: 1.) Passenger(size ni baby) 2.) Passages(pelvic bone structure, birth canal) 3.) Powers( enough uterine contractions/na nag dudulot ng cervical dilatation or pag buka ng cervix) If wala nman po kayo allergies, safe naman po sya 1 capsule 3 x a day. """