abortifacients / contraceptives?

As for a contraceptive, I don't think it's possible naturally. I know you're suggesting a fictional herb, but contraceptives are complicated since it's hormonal, so in my oppinion a contraceptive is not quite possible.

that's why i was gonna base the herb on sylphium, the idea is that it did somehow adjust hormones associated with pregnancy. wouldn't be extremely effective at all, but i thought it might be a fun addition. 

appreciate the input <3

I think in the nature of semi-realism, you could feasibly say it worked if you wanted it to. Though it might not work for everyone if it was shared (i.e. contraceptive worked for Ying, she shared the info w someone, it does not work for them)... back in the day there were incredibly ineffective contraceptives out there marketed as such (the sponge, LOL). So while it not might be 100% effective, or even work period, ...it could be said and passed around that it did? LOL