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Plasma glucose, cholesterol, triglyceride, and glycerol concentrations in the postmature rabbit

American Journal of Obstetrics and Gynecology, ISSN: 0002-9378, Vol: 136, Issue: 4, Page: 500-504
1980
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Article Description

Plasma cholesterol, triglycerides, glycerol, and glucose concentrations were measured in term and postmature rabbits. The data show that the term and postmature mothers have significantly higher glycemia than their fetuses. However, triglyceride and cholesterol concentrations are lower in the postmature mother than in her fetus. Postmature fetuses are characterized by very high plasma triglyceride and cholesterol concentrations. The results demonstrate that postmaturity is accompanied by maternal and fetal lipid metabolic changes related to a decrease in the transfer of maternal fatty acids through the placenta and to a diminution in fetal liver glucose utilization. The postmature fetus is then in a relative state of fasting and must rely on its own supply of fuel (glycogen and lipids) to provide cells for growth and survival. The maternal metabolic changes can possibly be explained by a decreased utilization of maternal substrates by the fetus, the placenta becoming insufficient. The close interrelationship of fetal and maternal lipid metabolism with the activity of the placenta suggests that an accurate knowledge of the metabolic changes taking place in the fetus during alteration of the maternal environment is indispensable to the understanding of the short- and long-term effects of maternal disease on the fetus.

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