Hyaluronic acid components exist in the extracellular matrix of the human body and have a certain degree of histocompatibility. Theoretically, hyaluronic acid does not have much effect on pregnant women and fetuses, but from technical considerations, try to avoid hyaluronic acid when preparing for pregnancy. Hyaluronic acid contains more cellulose components, some of which cannot be absorbed. Later on, the body may become allergic and rejection to cellulose, and discomfort symptoms such as swelling and redness may occur. There is also a risk of infection if the procedure is not done properly. These conditions require medication, and the application of a large amount of medication during pregnancy preparation may increase the risk of miscarriage or fetal malformation during pregnancy. In addition, hyaluronic acid injections into the face or other vascular-rich locations, such as the face, mid-forehead, temporal area, and nasal root, can cause complications, such as necrosis of large tissues and blockage of the middle retinal artery, if hyaluronic acid is inadvertently injected into the blood vessels, when treatment requires the use of multiple drugs or surgery, which can seriously affect the quality of pregnancy preparation, and doctors may even advise against pregnancy in the short term. Therefore, although hyaluronic acid itself is hyaluronic acid and does not have much effect on pregnant women and fetuses, it is still recommended to avoid injections when preparing for pregnancy to avoid adverse conditions due to a series of problems that may occur after the injection.