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cervical effacement
Cervical effacement (also called cervical ripening〔(American Pregnancy Association on effacement )〕) refers to a thinning of the cervix. It is a component of the Bishop score.
It can be expressed as a percentage.
Prior to effacement, the cervix is like a long bottleneck, usually about four centimeters in length. Throughout pregnancy, the cervix is tightly closed and protected by a plug of mucus. When the cervix effaces, the mucus plug is loosened and passes out of the vagina. The mucus may be tinged with blood and the passage of the mucus plug is called bloody show (or simply "show"). As effacement takes place, the cervix then shortens, or effaces, pulling up into the uterus and becoming part of the lower uterine wall. Effacement may be measured in percentages, from zero percent (not effaced at all) to 100 percent, which indicates a paper-thin cervix. Effacement is accompanied by cervical dilation.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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