The vast majority of pregnant women, a high proportion of neutrophils during pregnancy is a normal physiological phenomenon, but at the same time be alert to the possibility of infection, rheumatic diseases. I. Physiological reasons: pregnant women are stimulated by the embryo, the body will produce a rejection reaction, which leads to an increase in white blood cells and neutrophils, as a normal phenomenon. The reason: 1, bacterial infection: upper respiratory tract infection and urinary tract infection can lead to neutrophil elevation, also will appear leukocyte increase, the condition is light can observe and wait, more serious under the guidance of the doctor to use antibiotic treatment; 2, rheumatoid arthritis: in the rheumatic disease active period, can also appear faster blood sedimentation, and accompanied by neutrophil percentage increase, it is recommended to promptly consult the rheumatology Immunology, take reasonable treatment measures.