Low Birth Weight (LBW/BBLR) target set at the target nutrition improvement program. to Healthy Indonesia 2010 is 7%. Data of Dinas Kesehatan of Magetan were mothers who delivery of low birth weight baby is highest at Kecamatan Plaosan was 21 births (9.05%). The aim of the study to know the relationship of upper arm circumference (ULA) trimester III of pregnancy with birth weight in the BPS Keca…