I am 19 week 2 days pregnant, this is my first pregnancy. During anomaly scan in 18 week doctor said baby is unable to pass urine through bladder due obstruction showing distanted bladder 27mm , I have done another anomaly scan in 18 week 4 days showing distanted bladder 30 mm and still obstruction is there.doctor said this is likely posterior urethara valves and advice for abortion. What I do now I am very tensed.from all these weeks my all tests are normal and good report how this situation happens suddenly.