Whether a pregnant woman can affect her fetus when she urinates glucose 1+ depends on the level of blood sugar. When blood glucose is normal, it usually does not affect the fetus, and when blood glucose increases at the same time, it can have adverse effects on the fetus such as malformations. Pregnant women will have a decreased renal glucose threshold and will have symptoms of urinary glucose even if their blood glucose is normal. If this is the case no special treatment is needed and it will not affect the fetus, but regular blood sugar testing is needed. If a pregnant woman’s positive urine sugar is accompanied by abnormal blood sugar, it is mostly due to pathological causes of gestational diabetes, which may lead to fetal malformations, macrosomia and other conditions. Pregnant women with positive urine glucose should go to the hospital as soon as possible, complete the relevant examinations to clarify the cause, and take appropriate measures to intervene under the guidance of the doctor.