It is not recommended for pregnant women to wear nail art. Nail piece is to do nail art with a kind of stick on the real nail above the decorative nail, the main raw material for plastic material, in the nail coated with a variety of colors and patterns to play the effect of nail art, the appearance of the nails look very bright; however, when doing nail art on the fetus there may be a certain potential harm. 1. Glue: The use of glue to affix nail pieces to real nails will affect the nails to a certain extent. If inferior glue is used, it may also contain formaldehyde, which may affect the body of the pregnant woman and the development of the fetus, and there is a risk of causing malformation in the development of the fetus. 2. Nail material: formaldehyde on the nail belongs to chemical substances, does not guarantee that these chemicals have no effect on the fetus, especially the use of low-quality nail, the impact on the fetus there is a greater risk. Pregnant women who are in doubt about whether they can wear nail polish are advised to consult a doctor.