<prompt> About AFP all are true except:MSAFP detected 16-18 weeks of gestationDiabetic patients have increased AFP levelMSAFP is unrelated to period of gestationDecreased in down syndrome  <response>: AFP increased in wrong gestational age Rh isoimmunisation open neural tube defects multiple pregnancy IUFD Anterior abdominal wall defects renal anomalies D.C.DUTTAS TEXTBOOK OF OBSTETRICS,Pg no:106,7th edition and refer to previous question 