How much protein is normal in a pregnant woman's urine?

The normal amount of protein in a pregnant woman’s urine is less than 0.3 grams. Pregnant women should have a urine test conducted during each prenatal visit, according to National Institute of Child Health and Human Development.

An excess amount of protein in the urine is called proteinuria, according to National Institute of Child Health and Human Development. Proteinuria, especially when developing later in pregnancy, can be a sign of preeclampsia. This can evolve into eclampsia, which is when a woman with preeclampsia experiences seizures. Proteinuria can also be a symptom of a urinary tract infection, kidney infection or chronic kidney infection, according to HealthDay.