摘要
本文追踪研究了武汉市50例正常孕妇妊娠后期及分娩时母血、脐血和胎盘组织中维生素A(VA),β-胡萝卜素水平。结果表明:孕后期妇女血中VA2.17μmol/L(62.0μg/dl)显著高于非孕妇1.37μmol/L(39.4μg/dL),为其1.6倍,分娩时母血VA怠剧下降,接近非孕妇水平;非孕妇、孕后期和分娩时血中β-胡萝卜素水平分别为1.77、1.89和1.97μmol/L(104.0、111.3和116.4μg/dl),差异无显著性意义(P>0.05),脐血VA和β-胡萝卜素水平远低于母血,特别是β-胡萝卜素未能检出;胎盘中β-胡萝卜素水平明显高于VA,约为VA的10倍。β-胡萝卜素从母血转移到胎盘的效率高于VA,但对胎盘转运到脐血的能力远低于VA。
The serum concentration of vitamin A (VA) and B-carotene were determined in 50 healthy pregnant women in the later trimesters and parturition, their newborns and 20 non-pregnant women. In the meantime the contents of placental tissues were determined too. The results showed; 1. The serum VA content(2.17 umol/L, 62ug/dl)of pregnant women in the later trimesters was higher than that of non-pregnant women (1.37umol/L, 39ug/dl), but it decreased immediately after delivery. 2. There was no significant def-ference of the serum B-carotene concentration between the pregnant women and non-pregnant women. 3. The cord blood VA and B-carotene contents were much lower than those of maternal blood. 4. The contents of B-caro-tene in placentas were 9.6 times as much as VA. 5. The efficiency of transport of B-carotene from maternal blood to placental tissue was higher than that of VA, and lower than that from placenta to cord blood.
出处
《营养学报》
CAS
CSCD
北大核心
1991年第2期155-160,共6页
Acta Nutrimenta Sinica
关键词
Β-胡萝卜素
孕妇
胎盘
新生儿
retinol β-carotene pregnant women fetus placental tissue
