"Cloudy urine during pregnancy can be caused by a variety of things, and when it is the only symptom, it is likely that the cause is completely natural. Hormonal changes are among the most common causes of cloudy urine while pregnant, as the levels of estrogen and other pregnancy-related hormones are properly balancing themselves.
Another common cause of cloudy urine are dietary changes. During pregnancy, certain foods- most notably dairy- can have an adverse effect on the body, producing minor allergic reactions or chemical build ups that will result in cloudy urine. Most of the time, this is nothing to be concerned about. As a general rule of thumb, you should see a doctor if you experience cloudy urine for more than two days straight as this could be a sign of a more serious illness.
Cloudy urine can also be caused by a build up of protein. This is called proteinuria and can indicate seriously medical problems, the most serious being preeclampsia. Urine with an excess of protein will often be foamy as well as cloudy, and after one to two days with these symptoms, you should make an appointment with your doctor for a urinalysis.
A final cause of cloudy urine during pregnancy is disease. Sexually transmitted diseases during pregnancy can be very serious for both mother and baby and can manifest themselves in painful urination and cloudy urine. If you experience these two symptoms together, you should see a doctor as soon as possible.
Burning urination and cloudy urine can also be signs of urinary tract infections which should also be treated as soon as possible. While urinary tract infections are common in pregnant woman, if left untreated they can cause serious damage to the kidneys and bladder."
