Raspberry leaf tea when did you start taking it?

that's sooo strange...I've heard rumours about raspberry leaf tea working to induce labour....but was told that it doesnt necessarily induce labour or contractions, that it just "strengthens" your uterus and makes labour and contractions easier :) But maybe I've heard wrong. EIther way I started drinking it around 32 weeks and it's done nothing favorable to get me into labour...lol....I'm now 40+5 days prego and want this baby out :)