What reasons would your cervix dilate if you aren't pregnant? i have an iud, but it seems in place & no pain. some bleeding

Menstrual cycle: The degree to which the cervical canal is dilated various with the menstrual cycle. Typically, the cervical canal widens a little bit to accommodate the passage of menstrual blood. Around ovulation, midcycle, some women notice a clear, stringy discharge. These are all normal changes happening. An IUD does not affect the cervical canal.