Pregnancy herbal medicine is possible but requires special care: ① first trimester (1–12 weeks): minimum prescription only (morning sickness, fetal stability), ② mid-pregnancy (13–28 weeks): pregnancy-friendly herbs more available, ③ late pregnancy (29+ weeks): pre-delivery preparation herbs, ④ avoid: aggressive blood-moving herbs (Carthamus, Salvia), heat-clearing strong herbs, dampness-removing strong diuretics. Always inform the doctor of pregnancy first, and only take herbs prescribed for pregnant patients.