Is a baby shower permissible?

I didn't find any question regarding baby showers , so I'll first explain what a baby shower is: it is a celebration for a lady during her 5th or 7th month of pregnancy; In this function, bangles were wore to the lady for her full hands (thus we also call it a "bangle function"). I want to know whether Islam allows this function? I need authentic answer because, now that I'm pregnant, my family people are planning to do so. My intuition is that Islam does not allow this kind of function. But I want proof that this is not allowed from hadith and Sunnah.