Pregnancy urine occult blood 2 +, means the presence of hematuria; white blood cells 1 +, means that there is likely to be a bacterial infection, generally considered to be caused by a urinary tract infection. Factors that cause urinary tract infections include physiological factors, bacterial infections, and pathogenic bacterial infections. 1. Physiological factors: women’s uterus continues to grow during pregnancy, the ureter will be passively dilated, the smooth muscle of the bladder is affected by the influence of progesterone, the tension is weakened, it is easy to induce urinary retention, and then induce bacterial retrograde infection. 2. Bacterial infection: most of them are induced by gram-negative bacillus infection, and a small part of them are induced by gram-positive bacillus, which is related to the short urethra of women, adjacent to the vagina and anus, which can easily induce retrograde infection. 3. Pathogenic bacterial infections: such as chlamydia, fungi, adenovirus and Mycobacterium tuberculosis, which are related to the low immunity of women during pregnancy. It is recommended that women go to regular hospitals to receive examination and treatment, so as not to delay the condition.