I've been looking at French websites to see if tips differ, and it seems that sage is very popular there to induce labour (just as much as raspberry leaf tea for efficient contractions).
However, some seem to say that it's also bad for lactation.
I bought some sage leaf capsules today and it does say "not recommended for pregnant and breastfeeding women".
Some people absolutely swear by it and talk about going into labour within hours.
Any ideas??