Signs of labor: Know what to expect - Mayo Clinic
https://www.mayoclinic.org/healthy-lifestyle/labor-and-delivery/in-depth/signs-of-labor/art-20046184
WEBDec 16, 2021 · Opening of the cervix (dilation) Another sign of labor is the cervix beginning to open (dilate). Your health care provider will measure the dilation in centimeters from zero (no dilation) to 10 (fully dilated). At first, these cervical changes can be very slow. Once you're in active labor, expect to dilate more quickly.
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