Pregnancy generally does not cause glomerulonephritis, if glomerulonephritis occurs during pregnancy, it may be caused by the following reasons: 1, the patient has a history of glomerulonephritis, the symptoms disappear after active clinical treatment, laboratory tests are normal, glomerulonephritis clinical cure, this time, pregnancy can be induced by the recurrence of glomerulonephritis condition, swelling of the lower extremities, poor appetite, fatigue, and other symptoms reoccur, and the laboratory test shows that Urine protein (+).2. Pregnant women with hyperemesis gravidarum and elevated blood pressure can cause urine protein (+) and occult blood (+), which can lead to glomerulonephritis and other diseases.3. Women with colds, infections, and fatigue can develop glomerulonephritis if they have triggering factors during pregnancy.