i mixed castor oil, 200ml with 400 ml orange juic (or small bottle), first baby at 38 weeks and second at 37 weeks and 3hrs after taking it with my 1st i gave birth, and with the second one i deliveres 2 hours later. it mighn not work on everyone, but it surely worked for me.. and remember scull it down quickly and have a wet facewasher readdy to wipe your tongue afterwards, as ther might be an oily residue feel on it.totaly up to you, but im expecting my 3rd baby, due on25 june, and am willing to do it again if i dont go into labour by week 39, next week! good luck!