Because Desktop wallpaper images have varying colors, it is easy for the font colors to be unreadable if they are on top of the same color as a wallpaper image. For instance a black font on top of a dark part of the background image or a white font on a white part of a background image. The Desktop icon fonts are dynamic and will show white on dark backgrounds and change to white with a black shadow effect on a light background. Hope this helps. Thank You for using Windows 7.
It also prepares your body for pregnancy each month. A cycle is counted from the first day of 1 period to the first day of the next period. The average menstrual cycle is 28 days long. Cycles can range anywhere from 21 to 35 days in adults and from 21 to 45 days in young teens.The rise and fall of levels of hormones during the month control the menstrual cycle. Your periods become very irregular after having had regular, monthly cycles. 2  Your period occurs more often than every 21 days or less often than every 35 days. 3  You are bleeding for more than 7 days. 4  You are bleeding more heavily than usual or using more than 1 pad or tampon every 1 to 2 hours.
Females begin their menstrual cycle during puberty at the onset of menarche, their first menstrual period. Females continue to have many menstrual cycles throughout their lives until menopause occurs between ages 40 to 60. The average menstrual cycle lasts about 28 days, but can last anywhere from 24 to 42 days.