Hello I will certainly clarify your doubts You need not to worry until any diagnosis confirmed your doctor can tell you about any organic cause for no sperms after physical examination and all relevant investigations. You also can improve its quality and quantity by adopting healthy life style modifications and dietary supplements Avoid smoking and alcohol Exercise regularly Have lots of fresh fruits and steamed vegetables Multivitamin and minerals supplements Please feel free to ask for more clarification, I will.be happy to help you Best wishes