What Causes High White Blood Cells? I Am 7mths Pregnant & My Doctor Ran Sum Blood Tests On Me And My White Blood Cell Count Is Extremly High. It's Supose To Be A Count Of 6 And Mine Is 18..does Anyone Know What It Might Be?

I am nearly 8 months pg and during routine blood test the results came back as elevated white cells. Up at 17.4. When I took results to my Obs he said in later stages of pregnancy the normal range is higher than in a non pregnant woman. He said he would accept anything up to 15 and perhaps I had infection, to get it rechecked in two weeeks. A couple of days later I developed a urinary tract infection, even though the nurse tested my urine on the day I got blood test done and it was clear.
Anyway retested there on wed after course of anti b's. Got results today and they are back at 14. So I'm happy enough this was the cause.
Gp wants me to re check them again in a month but insisted no hurry on them if I wanted to wait until after the birth.
I hope this helps you with your question. I know when I heard 17.4 I nearly died, but the fact that wbc are elevated in late pregnancy it is more than likely you have an infection that hasnt presented itself yet.