Blue cohosh should be avoided during pregnancy. Dangerous herb that can cause fetal heart problems and uterine contractions. The primary risks are: Fetal heart failure, Uterine contractions, Neonatal toxicity. These pose real dangers to both mother and baby. This guidance is based on ACOG recommendations for pregnant women.
An "Avoid Completely" rating means major health authorities (FDA, ACOG, CDC, and/or USDA) advise against this food during pregnancy due to a specific, well-documented risk — not a minor precaution or a matter of personal preference. Foods in this category typically carry either no safe preparation method (as with alcohol) or a meaningfully elevated risk of foodborne illness or fetal harm even with careful handling. If you’re unsure whether a past exposure is a concern, your provider is the best resource for guidance specific to your situation.