vaginapagina | Size of uterus changing? (Reply)

Due to other birth control issues, the IUD is the only option available to me beside barrier methods (Paraguard, the only non hormonal one available in the US). however, when I went to get the IUD, my uterus only sounded to 5cm. It has to be at least 6cm to get the IUD , and average size in women who have not had a child is 7cm.

I read somewhere (I think) that hormonal birth control can thicken the lining of the uterus, could this cause a smaller sounding? If so, would going off that hormonal birth control change the size and/or sounding of the uterus?