Pregnant women should not use toothpaste containing fluoride or antibiotics, or toothpaste with special herbs. If pregnant women use fluoride toothpaste frequently during pregnancy, the fluoride ions in the fluoride toothpaste may be absorbed into the blood, and these fluoride ions may pass through the placenta and enter the fetus, causing fluorosis, or enter the fetus’s dental embryo, causing dental fluorosis. After birth, the baby’s milk teeth will form chalky white or yellow plaque, and will be prone to decay. In addition, it is better for pregnant women not to use toothpaste containing antibiotics because some antibiotics can enter the fetus through the placenta and may cause fetal malformation if applied in early pregnancy. Try to use less toothpaste containing herbs, some of these herbs are not clear and may also cause fetal malformation.