Wild Yam as contraceptive?

[Bumperstump Cummerbund]

I was gonna say that MrsS - I certainly hope its NOT a contraceptive, but it would explain a few things!

[Glamourcide]

From what I've just read, it's all about the dosage?? Sounds pretty odd to me, but the herbalist who supposedly used it successfully for three years to prevent pregnancy, then just upped her dosage to encourage pregnancy?
Lol this is weird!!

[Rainbow_Mumma]

It could be to do with the dosage this book doesnt say anything about doseage just about 2 pages of how it works to encourage conception and some recipes (where do you get yam from? i know its different but similar to sweet potato!) i may have to investigate this!