The midwives at our birth class told us not to drink it until 34 weeks - they had seen a couple of cases where some women had bought a particularly strong brand that brought labour on only after just one cup... Im not sure which brand but apparently it was one made in NZ.
Ive noticed since starting to drink it last week (started at 36wks), Ive been experiencing some period like pain, but Im wondering if its just my uterus gearing up and trying out some braxton hicks..