Will Radiesse Have Any Effect on Pregnancy?

Hi Latte.  If the 4-5 month plan for your pregnancy is possibly sooner rather than later, we would definitely not suggest it.  

While there is no evidence to suggest that your baby would be at risk if you were to have these injections and then become pregnant, there is also not compelling reason to risk it if a pregnancy is relatively likely.

No physician in their right mind is going to want to move forward with this procedure if it's likely you will become pregnant in the near future.

There are two components to why you should wait for Radiesse after pregnancy.  

First of all, there is limited data on the effects of facial fillers and the impact of pregnancy.  Much better to avoid any risk and wait.  

Second of all, facial fillers are not often requested for aging purposes in pregnancy due to the fact that increased blood flow and volume occurs during this time, making the use of a facial filler inappropriate.

Since you are talking about Radiesse for the nose, beware of the many issues with Radiesse injection in the nose and the likelihood if a rhinoplasty is needed that your operation will likely not be possible or limited due the permanent damage caused by Radiesse.

As surgeons and physicians (and both) we often error on the side of safety. What is the benefit vs. the risk? While it is not clear that the risks are large, delaying Radiesse treatment for a few months would be the advice we would provide at our San Francisco area practice.
You should also be a bit cautious about a practioner that would provide a non-FDA approved treatment during your pregnancy. Maybe there are other corners they might cut.
As always, seek a board certified plastic surgeon or dermatologist.
I hope this helps.