I agree that red raspberry is to tone & strengthen the uterus. There is red raspberry in my prenatals that I've been taking since a month before getting pregnant. I'm now 27 weeks along. I'd be pretty screwed if it were supposed to induce labor.
You can get loose leaf raspberry tea at health food shops here because it's supposed to be good for you during pregnancy. We also have specialty tea shops here that I'm sure would sell it if you have anything like that where you are.
both me and my sister tried it, and didnt work. Look at it like any other tea. Tea is suppose to help make your muscles strong when labor comes. Im 3 days past my due date and not dialated at all.
It also helps make labor faster
It doesn't induce labor at all its used to tone your uterus that's what my midwife told me