Hi my fiancee she is 20 years old, she misses her menstrual cycle everytime sometime 5 days sometime it goes for even month. She has a thyroid as well. What shall we do. We consulted to gynecologist and he said its a symptoms of pcod the Dr. Said she has to continue the tablets for menstruation cycle due to which she can come on proper time to time and for pcod he said that she has to continue the tablets for lifetime. We are really worried please suggest what can be the best possible. Is it safe to have tablets for menstrual cycle because when she stop taking tablets again she miss the cycle.