2012-2-20 10:43Sleep or wakefulness is a normal physiological process, but it is not an activity that can be fully controlled at will; rather, it is a passive process. It's u......
2012-2-19 15:54Menstrual irregularities and dysmenorrhea can be caused by various reasons, such as irregular living and eating habits, high mental stress, bad mood, etc. Thes......