We prepare our Yarrow Extract from the flowering tops of Achillea millefolium plants which are Certified Organically Grown and/or Sustainably Wildcrafted in their native habitat in the Siskiyou & Cascade Mountains of Oregon. To assure optimal extraction of Yarrow's bioactive compounds, the uppermost flowering tops are hand-harvested at their peak of potency, are carefully shade-dried to retain their full color & aroma, and are then thoroughly extracted. Seek expert medical advice before taking during pregnancy.