Regarding alpha fetoprotein true statement is:
AFP Produced by yolk sac and fetal liver Highest level of AFP in feta lserum and amniotic fluid isreached around 13 weeks and thereafter it decreases. Maternal serum level reaches peak around 32 weeks and increased in hepatoma,NTD,Rh isoimmunisation,IUFD,Multiple pregnancy D.C.DUTTA'S TEXTBOOK OF OBSTETRICS,Pg no:106,7th edition
Major source in fetal life is yolk sac
Commonly increased in wilm's tumour
Maximum level at 20th week
Half-life 5-7 days
Diagnosis in obstetrics