Means your cervix is getting shorter and thinner getting ready for baby to come. Here a good site to read about it. http://www.justmommies.com/articles/effacement-and-dilation.shtml
thanks.. I'm having sweep at 38 weeks so hopefully I may get told something I'm not sure if in the UK they use that as I never had it with my first x
They go by % 0 is not effaced 100% is fully effaced and should be dilating and/or in labor im 38 weeks and 50% effaced