D & B stands for the Dunn & Bradstreet Corp., which specializes in gathering credit ratings for registered and non-registered companies. Having a company's credit rating information gives decision-makers an advantage when considering the potential risks in dealing with a particular company.
The Answer: There isnât any hormonal reason some women feel totally drained during their period. Itâs totally normal to feel mood swings or crave sweets or salt, but nothing about menstruation itself should be making you feel tired. Instead, a few of your habits, which are a reaction to how crummy you feel when youâre menstruating, could be contributing to your low energy levels.
1 Age. 2  When teens first start having periods, their menstrual cycles may not always be on the same schedule every month. 3  It may take several years to settle into a pattern. 4  In addition, missed periods and lighter or heavier periods are common as women near menopause. normal menstrual cycle lasts 28 days, plus or minus seven days. Menstrual bleeding is considered irregular if it occurs more frequently than every 21 days or lasts longer than 8 days. Missed, early, or late periods are also considered signs of an irregular cycle.