My menstrual comes once or twice a year & along with that my urine smells like ammonia! What could be wrong?

eating meat (or anything high in protein), asparagus, a uti or not drinking enough water is normally what cause the smell to get strong. you're supposed to drink 2 ltrs (8 cups) of water on a regular day. then for every 15-30 mins of vigorous exercise or sweating you should have another cup or 2. But urine contains ammonia (although you can't normally smell it). that's why you're supposed to be careful with the chemicals you use to clean the toilet. But some women don't get their period very often. You may also be underweight. Talk to your doctor or gynecologist.