 lipid metabol toxemia normal pregnanc amount fatti acid composit total lipid extract serum examin normal pregnant women second third trimest earli postpartum period patient mild sever preeclampsia essenti hypertens placenta term examin total lipid fatti acid composit normal women total serum lipid increas pregnanc rise pronounc preeclampsia hypertens serum palmit mildli elev preeclampsia total lipid arachidon acid elev placenta preeclampt women find compar anim develop eclampsia experiment basi 