When the cervix effaces, the mucus plug is loosened and passes out of the vagina. The mucus may be tinged with blood. This passage of the mucus plug is called show or  bloody show .. You may or may not notice when the mucus plug passes. Effacement is described as a percentage. For example, if your cervix is not effaced at all, it is 0% effaced. If the cervix has completely thinned, it is 100% effaced.
Resource Description and Access. Resource Description and Access (RDA) is a standard for descriptive cataloging initially released in June 2010, providing instructions and guidelines on formulating bibliographic data.
About RDA. RDA stands for Recommended Dietary Allowance, also commonly known as Recommended Daily Allowances. It is the recommended daily vitamins and mineral intake considered adequate for healthy people. The RDA was last revised in 1989, and is rather outdated. Parts of it are replaced by the Dietary Reference Intakes (DRI), the most recent dietary guidelines by the Food and Nutrition Board of the Institute of Medicine, National Academy of Sciences, 1997-2001, in a collaboration between the US and Canada.