1, the body is dehydrated: early pregnancy, due to poor appetite or even nausea, vomiting, resulting in dehydration, and pregnant women do not like to drink water resulting in insufficient intake, eventually causing urine concentration, yellow urine, at this time, pregnant women need to drink more plain water, increase the amount of intake, but do not drink cold water or carbonated beverages In order to avoid stimulating the contraction of the uterus, affecting the growth and development of the fetus; 2, the role of certain drugs or food: some acidic diet during pregnancy will lead to deepening the color of urine, yellow or consumption of vitamin C, because the drug is not completely absorbed by the body, resulting in yellow urine, at this time do not have to be too nervous, do not have to do much intervention; 3, combined urinary tract diseases: if, in addition to yellow urine, also has the frequency of urination, urinary urgency, painful urination, difficulty in urination and other symptoms, it may be the case of urinary tract diseases. If it is diagnosed as urinary tract infection, you should actively cooperate with the doctor for treatment and apply antibacterial drugs under the guidance of the doctor, do not take any medication without authorization to avoid affecting the differentiating embryo. Therefore, pregnant women should develop a healthy lifestyle and eating habits in the early stage of pregnancy. Have regular prenatal checkups and pay attention to your condition and the health of the fetus to avoid accidents.