Cervical dilation is the widening of the cervix, the lower part of the uterus that connects to the vagina. It occurs naturally during labor and childbirth, but it can also be done artificially for medical procedures such as dilation and curettage (D&C) or the insertion of an intrauterine device (IUD).
There are a few different ways to check if you are dilated. One way is to insert a finger into the vagina and feel for the cervix. The cervix will feel soft and slightly open if you are dilated. Another way to check is to use a cervical dilation gauge. This is a thin, plastic tool that is inserted into the vagina and measures the diameter of the cervix.