"Women have used the seeds from Daucus carota commonly known as wild carrot or queen anne's lace, for centuries as a contraceptive, the earliest written reference dates back to the late 5th or 4th century B.C. appearing in a work written by Hippocrates. John Riddle writes in Eve's Herbs, that queen anne's lace (QAL) seeds are one of the more potent antifertility agents available, and a common plant in many regions of the world. "The seeds, harvested in the fall, are a strong contraceptive if taken orally immediately after coitus."

"Research on small animals has shown that extracts of the seeds disrupt the implantation process, or if a fertilized egg has implanted for only a short period, will cause it to be released. There has been some research done on wild carrot seeds mostly in other countries, the results of those experiments have been encouraging. The Chinese view QAL as a promising post-coital agent, "recent evidence suggests that terpenoids in the seed block crucial progesterone synthesis in pregnant animals." 1 When asked about the contraceptive effects of wild carrot, some herbalists have described it as having the effect of making the uterus "slippery" so the egg is unable to implant."