You will be asked to provide a urine specimen, which is tested by a nurse or midwife to check for possible irregularities. Glucose (sugar) More than a trace of glucose may be a sign of diabetes. You may need a blood test. Protein When this is found in quantity in the urine, it may signal a bladder or kidney infection, or preeclampsia. Ketones These are substances, that if present, mean that the body''s metabolic system is upset, probably because you haven''t eaten enough or have vomited. |