Its been 4 years that i did not have menstruation. my son is going to be 4 this month n after his birth my menstrual cycle has not restored till yet. I consulted a doctor last year. she did all the tests n found everything normal n said tht it happens sometimes due to harmonal changes due to prolonged breast-feeding n also said tht it will take time so she asked me to wait but again its been 1 year n the problem is not solved. could you please guide me about the probable reasons for it.and also any remedy.