Can Periods Be Delayed Intentionally? Yes, they can. The most commonly used medications are progesterone based hormones, such as: Norethisterone Medroxyprogesterone acetate These are usually started 35 days before the expected date Many women suffering from irregular menstrual cycles due to PCOS have testified to Glutathione helping them regularize their cycle, bringing it back to its normal rhythm. Do you have a Late again? Menstrual Cycle Fluctuations of Progesterone and the Effect on Sleep Regulation Restorative Medicine 10 Tips To Help Speed Up Your Menstrual Cycle And Get Your Period Immediately The effects of N acetylcysteine on ovulation and sex hormones profile in women with polycystic ovary syndrome: a systematic review and meta analysis British Journal of Nutrition Cambridge Core Why Is My Period Late? Reasons, Causes, and More.