 placent cord blood lipid comparison set doubl ovum twin stillborn live-born 1 determin phospholipid total free cholesterol triglycerid nefa placent tissu cord blood set doubl ovum twin stillborn live-born 2 similar occur fraction studi cord blood triglycerid nefa level 3 serum stillborn infant contain on-third triglycerid 21 2 time nefa live-born infant 4 phospholipid content total lipid content stillbirth placenta highest studi laboratori includ determin 26 live birth 5 suggest increas lipoprotein lipas activ cord blood accompani intrauterin fetal death 