Since Western medicines are mostly chemically synthesized, many of them have adverse effects on the fetus, especially since the “reaction stop” that caused fetal malformation in the 1960s, many pregnant women have a fear of Western medicines, so for the safety and health of the fetus, during pregnancy, when pregnant women need to use drugs due to illness, they prefer to use Chinese medicine. For the safety and health of the fetus, pregnant women prefer to use Chinese medicine when they need medicine for illnesses during pregnancy. However, not all Chinese medicines are absolutely safe. Many herbal medicines contain a variety of alkaloids and chemical components that are very complex, especially when combined with each other, the effects vary greatly, and some of them can directly or indirectly affect the growth and development of the fetus. Therefore, in the first trimester of pregnancy, pregnant women should be cautious in using some Chinese medicines in addition to western medicines to avoid malformation or premature birth or miscarriage. Drugs with high toxicity and heat. For example, raw nansheng, gansui, cinnabar, xiong huang, dahurian, epiphyllum, shanglu, zebra, centipede, arsenic, etc., are drugs with certain toxicity in themselves. The Chinese medicine Xiong Huang has been confirmed to have teratogenic effect, pregnant women should be absolutely prohibited from taking internally, vermilion contains permeable mercury salts (i.e. mercury), which can accumulate in the body of pregnant women, leading to small head malformation, deafness, strabismus, mental retardation, etc. in newborns. Blood-activating and stasis-removing drugs. Such as peach kernel, safflower, heliotrope, pu huang, motherwort, angelica, trigonella, curcuma, leech, gadfly, perforator, frankincense, myrrh, etc., can accelerate the blood circulation of pregnant women, with the role of stimulating the uterus, reflexively causing strong contraction of the uterus, resulting in intrauterine ischemia and hypoxia of the fetus, causing fetal stunting and various malformations, and even cause miscarriage, premature birth and stillbirth. Slippery tapping drugs. Such as slippery stone, mouton, petuniazi, dong quaizi, coix seeds (root), croton, coriander, halberd, sweet sophora, etc., more than the role of ventilation and diuretic, can stimulate the intestinal tract and digestive system, excite the uterus and cause reflex contraction, so that the fetus is unstable and cause miscarriage, preterm delivery. Aromatic drugs. Such as cloves, incense, musk, etc., can cause contractions of the uterus through the nervous system, which can also easily lead to premature delivery or miscarriage of the fetus. Many abortion or induction of labor drugs, musk is one of the main ingredients. Pregnant women should also be warned that there are many herbs with toxic side effects that are often found in the form of formulas in proprietary Chinese medicines, and therefore must be used with caution for herbs containing the above mentioned categories. Pregnant women should avoid taking Chinese herbal medicines that have been indicated as prohibited or cautioned, or choose drugs with similar efficacy and no side effects instead. In the rich treasury of Chinese medicine, there are only a few drugs that have adverse effects on pregnant women, and Chinese medicine as a natural medicine still has much fewer side effects than Western medicine. Therefore, pregnant women do not need to avoid seeking medical treatment when they are ill, but should seek medical consultation in time and take the initiative to introduce the conception situation to the doctor, and ask the doctor to weigh the pros and cons and choose to use Chinese medicine for the health of the pregnant woman and the fetus.