What does it mean if white tissue comes out in urine and you missed your period? is that a sign or pregnancy?

Doctor can evaluate: White tissue in urine could mean many things, but the most common would be an infection in the urinary tract. While these types of infections are more common in pregnancy, they can occur in non-pregnant women as well. However, they can be quite dangerous in pregnancy, so these symptoms in conjunction with the possibility of pregnancy are a definite reason to see your doctor soon.