Intermediate
Technical
IVT
Effacement
The thinning and shortening of the cervix during labour preparation.
Full Definition
Cervical effacement is the process by which the cervix becomes thinner and shorter in preparation for childbirth. Measured as a percentage, complete effacement (100%) means the cervix has been completely drawn up into the lower uterine segment. This process often occurs gradually during late pregnancy and early labour, and is assessed alongside cervical dilation to determine labour progress. In obstetric documentation, editors should ensure that effacement measurements are clearly distinguished from dilation measurements.
Usage
Usage note: Often expressed as a percentage; ensure consistency in documentation format.
In Context
- "Cervical examination revealed 80% effacement with 4 cm dilation." — Labour assessment note
- "The patient showed minimal effacement despite regular contractions." — Triage evaluation
Also known as
cervical thinning
Contrasted with
cervical thickening
Don't confuse with
dilation
engagement