In the first stage 2.Clinical features (5)
Dilation and taking up of the cervix --- by vaginal and rectum examination the dilation and taking up is found.
Cervical dilation is expressed in terms of centimeters. It is usually measured with fingers but recorded in centimeters.
One finger equals to 1.6 cm and when the dilation is more than 6 cm, it is easier to subtract twice the width of the remaining ‘rim’ from 10 cm to measure the actual dilation.