You may have already heard of these and some are the most common, but i didn't know why half of them were supposed to set you off. # Orgasm. If your water has not broken, you could try intercourse: semen contains a small amount of prostaglandin, and orgasm causes oxytocin to flow. If your water has broken, oral or manual stimulation of the clitoris also can lead to orgasm, and thus to contractions. # Nipple stimulation releases oxytocin: stroking nipples, using a breast pump, or oral stimulation. Discontinue if contractions come more than every four minutes, or last longer than one minute. # Acupressure on spleen 6 point: lower leg, 4 finger-breadths above inner ankle bone. Apply pressure in on-off cycles of 10-60 seconds each for up to 6 cycles. # Enema or castor oil. Bowel contractions may stimulate uterine contractions. This isnt pleasant, so usually only used to avoid medical induction methods. I have never heard of the accupressure one before, so i will be trying that tonight Am i also right in thinking that most labours start at night while you are asleep as that when your body releases the most hormone??? Don't know if any of these were any good but i thought i would post them anyway.