Hi and thanks for the query,
failure to have a normal menstrual flow suggests first a
pregnancy test. If an appropriate pregnancy test is negative, it is called secondary
amenorrhea and deserves an in depth investigation. It is not unusual however to experience this is young females of reproductive aged.
Causes could range from brain, uterine to other metabolic problem. Increased prolactine secretion could lead to lack of periods. Abnormalities of the uterus and ovaries could also be implicated. Uterus disease, hypertrophy or problems with the
cervix are common causes. general diseases like thryoid disease could have manifestations at the levels of the menstrual cycle.
A clinical evaluation is a key aspects in the diagnostic process. Doing an
ultrasound, measure of serum prolactine levels,
thyroid disease screen initially could give a clue to possible causes. I suggest you consult your gynecologist for a proper clinical evaluation.
Thanks and best regards,
Luchuo, MD.