Many herbs are contraindicated in pregnancy, especially when taken internally as some may cause uterine contractions or cause a miscarriage due to their astringent effects. It is best to seek the advice of a Healthcare professional if you intend to use herbs internally. It is generally recommended not to use any herbs during pregnancy, especially in the first two trimesters. There are exceptions to this rule such as using the herbs slippery elm and ginger for symptoms of morning sickness such as nausea.
Alfalfa, Andrographis, Blue Cohosh, Pennyroyal, Ephedra, Juniper, Schizandra, Yohimbe, St Johns Wort, Black Cohosh, Dong Quai, Golden Seal, Coltsfood, Bugleweed, Bearberry and Barberry.
Some of these herbs are not safe for use in pregnancy due to their emenogogue effects but also due to the following reasons: