Can the use of Finasteride / Dutasteride shrink the penis ?

Im 24 and have just started to take Finasteride for hairloss. I have had my bloods done for the sake of future reference. One thing that has me terrified is the possible prospect of penis shrinkage (length+ girth). This seems to be something that numerous people have reported, with even rat studies suggesting this. Is this a real possibility ? My thoughts were that the decrease in DHT could cause androgen dependant tissue in the penis to perhaps shrink ? Any advice would be much appreciated.