rasberry leaf does not help bring on labour, it softens the cervix and is suppost to make the second stages of labour (the pushing part) easier and quicker. i also read somewhere that it can help to control excess bleeding after the birth and give a healthy milk supply. im also taking these tablets at the moment, i mentioned it to my midwife at 31 weeks and he said it was fine to start taking them, i didnt start until 32 weeks as there is alot of conflicting advice as to when they should be taken. i have been told by my midwife if i get more frequent braxton hicks, then the dose should be lowered. then slowly built back up again. hope this helps you ladies. xx