A long ways to go...: Dilated to 2cm: The bottom of the uterus (The cervix) is open about 3/4 of an inch. Fully dilated is 10cm. Effacement: The cervix is 4-5cm long. 50% effaced means that the cervix has thinned to 2 - 2.5cm. Station: When your Ob checks your cervix, he/she can feel a landmark called the Ischial Spine. When the fetal head is at this point it is at zero station. -3 Station means 3cm above.
Answered 11/17/2015
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