baby centre on protein in wee:
'At antenatal appointments your midwife may use a dipstick to check for protein in your urine sample. The presence of protein in your urine (proteinuria) gives information about how your kidneys are working.
Low amounts of protein are not uncommon, and may simply mean that your kidneys are working harder than before pregnancy. Your body may be fighting a minor infection, and the midwife may send your urine sample for analysis, to establish whether you have a urine infection , and of what type. You may then be prescribed antibiotics.
At the next appointment the midwife will establish whether there is still protein present, and whether the amount has increased. Increased proteinuria, as it's known, may be an indication that you are developing pre-eclampsia, a potentially serious condition of pregnancy that can affect the health of both mother and baby. A combination of raised blood pressure , worsening proteinuria and swelling of fingers, feet and face suggests pre-eclampsia. Sometimes only one of the symptoms is present. If your urine sample has high levels of protein, your midwife may take a blood sample to check on your liver function. '