Dilated Pregnancy Chart. In figure c, the cervix is 60 percent effaced and 1 to 2 cm dilated. During the first stage of labor, the cervix opens (dilates) and thins out (effaces) to allow the baby to move into the birth canal.
Some boards that have incorporated these are. In figures a and b, the cervix is tightly closed. That’s why there is some overlap in the chart.