We are not aware of any problem that a hyaluronic acid filler would present during pregnancy, however there are risks with all procedures and should a complicaton occur that would require an enzyme to be injected to dissolve a lump of the filler, or antibiotics or antiviral medication be needed to treat an infection which is extremely rare, your pediatrician may prefer for you not to have those supplemental treatments unless absolutely necessary. Waiting a week or two after filler to ensure you're happy with the result and that there's no complication, prior to conceiving, may be prudent.The information provided in Dr. Shelton's answer is for educational purposes only and is not intended to constitute medical advice. The information provided should not be relied upon as a substitute for consultations with a qualified health professional who may be familiar with your individual medical needs.