Hi! I'm getting married on May 15, 2011, followed by a couple of religious ceremonies. I've been advised to take Regestrone starting 5 days before the onset of my menstrual cycle and continue them for a period of 10 days, to delay my menses. I want to understand if it is effective in doing so, how it works and whether it has any side-effects. I'm 27 years old, 5'3" and weigh 46 kgs.