Hey Becky

your baby comes when he or she is ready...but to get your body into the groove...

raspberry leaf tea - does not start labor, but tones the uterine muscle, making it more effective in labor and preventing postnatal bleeding
reflexology - stimulates points on the foot and lower lag
acupuncture
yoga - optimal position of the baby in the pelvis, and therefore acting on the cervix
hypnobirthing - to let go of any fear with childbirth, and letting the hormones do their work
sex - prostaglandins in semen soften the cervix, and orgasm releases oxytocin (the hormone essential for uterine activity)
chilli (such as a hot curry) - stimulates the bowel, which in turn stimulates the uterus

hope this helps

xx yogababy