Urine occult blood (++++) measured when pregnant is a more serious situation, but the causes of this test result are different and its severity also differs to a certain extent, other test results can be integrated to clarify the cause and treat the cause: 1, vaginal bleeding: pregnant women with placenta praevia can show painless vaginal bleeding, the presence of placenta abruptio can show vaginal bleeding with sudden persistent abdominal pain, both can contaminate the urine, affecting the test results and may affect the smooth delivery of the fetus. It can affect the test results and may affect the smooth delivery of the fetus, and the situation is more serious; 2. Chronic glomerulonephritis: pregnant women show abnormalities such as proteinuria, hematuria, edema and hypertension. When the blood pressure is normal and the kidney function is normal or mild renal insufficiency, it usually does not affect the fertility. However, if it is accompanied by hypertension and moderate to severe renal insufficiency, it may seriously affect fertility and the health of mother and child; 3. SLE: pregnant women may have abnormal urine routine due to kidney involvement, such as urinary occult blood 3+, which may lead to habitual abortion, recurrent stillbirth, fetal growth restriction, premature birth and other serious problems; 4. urinary stones: urinary stones during pregnancy may also lead to urinary occult blood, and lithotripsy treatment at this time It may affect the fetus and can only be treated after delivery, but generally does not threaten the fetus and maternal life and health. The cause of the disease cannot be diagnosed only by the data of urinary occult blood 3+. Pregnant women should go to the hospital actively at this time, and combine the results of blood pressure measurement, urinary ultrasound, kidney function, blood routine and other tests to clarify the cause of the disease and then actively carry out treatment.