For women giving birth for the first time, the mucus plug is usually expelled days before labour begins and may often be a sign of early labour. Generally, it is never reason to worry regardless of whether the mucus plug is released early or late.
Hard drive. A hard disk drive (sometimes abbreviated as Hard drive, HD, or HDD) is a device used to permanently store and also retrieve information. There are many variations, but their sizes are generally 3.5 and 2.5 for desktop and laptop computers respectively.
hard disk. A hard disk is part of a unit, often called a disk drive, hard drive, or hard disk drive, that stores and provides relatively quick access to large amounts of data on an electromagnetically charged surface or set of surfaces.