Pill packages have active pills (with hormones) and placebo pills (no hormones). The number of placebo pills can vary depending on the type of pill used. Your menstrual period should occur during the placebo pills due to lack of hormones. You are still protected from pregnancy during the placebo pills.
Making the Case against the biting midge: evidence is building that the biting midge, Culicoides sonorensis, is a vector of vesicular stomatitis virus (VSV), which causes significant economic losses in cattle, horses, and swine.
VSD: Vestibular System Disorder: VSD: Vykon Tridium Distributor (energy control services) VSD: Volunteer San Diego (San Diego, CA) VSD: Voltage Sensitive Dye (imaging) VSD: Virtualized Software Development (Virtutech, Inc.) VSD: Virus Signature Database (antivirus software) VSD: Vail School District (Arizona) VSD: Valley Sanitary District (various locations) VSD