can doing the fast especially the 16.8 or 5:2 affect your menstrual cycle in any way?before starting i would like to know if anyone has experienced any disruption in their periods(irregular periods or complete stopping of it) during their fast . is it safe for a woman who is 21 to do it? i just want to reduce some 10-12 kgs and have heard that fasting can cause issues in women (fertility problems)