What is 50 percent effaced and 3 cm dialated mean?

In pregnancy, being 50 percent effaced means that the cervix has thinned out to half its original thickness in preparation for labor. Being 3 centimeters dilated indicates that the cervix has opened to 3 centimeters, a sign that the body is getting ready for childbirth. Both measurements are part of the process of cervical changes that occur as labor approaches. These indicators help healthcare providers assess how close a woman is to delivering her baby.