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.
Vector graphics drawing file for Microsoft Visio. VSD is a file extension for a vector graphics file format used by Microsoft Visio. VSD stands for ViSio Drawing. Microsoft Visio is vector-based software used to create diagrams and flowcharts. To view a VSD file without Visio installed, Microsoft provides the Visio Viewer. After Visio Viewer is installed, Internet Explorer can open the Visio Drawing file.