A piece that explores Tanacetum vulgaris essential oil as a neurotoxic because of chemical constituent thujone. Shows a copper distill wth a zygote connecting to brain and tansy flowers disrupting the maternal reproductive system. Thujone is a bicyclic monoterpenoid ketone, two isomers, that crosses the blood-brain barrier and can cause convulsions. Tansy is a very thujone-rich essential oil that is best avoided during pregnancy.