Will Radiesse harm a pregnancy?

I would not be concerned about discovering that you are pregnant a week after having had Radiesse injected into your cheeks.  First of all, you are correct that the main composition is calcium based.  Second, the Radiesse will only stay in your cheeks and not circulate throughout your body so there should be absolutely no harm to your fetus.  

I have injected many patients who had no idea they were pregnant, and if you are in the medical field you know these substances including permanent ones like bellafill and silicone are not absorbed and have no way of causing harm to a fetus that is in a completely different circulation.  I suggest no cosmetic procedures during pregnancy to my patients, however, if they do get them the chance of harm is almost nothing. I suggest seeing a high risk OB if you are that concerned and need peace of mind.  Best,

You should be okay, but there is little clinical research documenting this situation.  A consultation would be necessary to give you a more definitive recommendation.