Book contents
- Frontmatter
- Contents
- Contributors
- Preface
- Section 1 Trends and determinants of obesity in women of reproductive age
- Section 2 Pregnancy outcome
- Section 3 Long-term consequences
- Section 4 Interventions
- 14 Intervention strategies to improve outcome in obese pregnancies: focus on gestational weight gain
- 15 Interventional strategies to improve outcome in obese pregnancies: insulin resistance and gestational diabetes
- 16 Intervention strategies to improve outcome in obese pregnancies: micronutrients and dietary supplements
- 17 Pre-pregnancy bariatric surgery: improved fertility and pregnancy outcome?
- Section 5 Management and policy
- Index
- Plate Section
- References
15 - Interventional strategies to improve outcome in obese pregnancies: insulin resistance and gestational diabetes
from Section 4 - Interventions
Published online by Cambridge University Press: 05 August 2012
- Frontmatter
- Contents
- Contributors
- Preface
- Section 1 Trends and determinants of obesity in women of reproductive age
- Section 2 Pregnancy outcome
- Section 3 Long-term consequences
- Section 4 Interventions
- 14 Intervention strategies to improve outcome in obese pregnancies: focus on gestational weight gain
- 15 Interventional strategies to improve outcome in obese pregnancies: insulin resistance and gestational diabetes
- 16 Intervention strategies to improve outcome in obese pregnancies: micronutrients and dietary supplements
- 17 Pre-pregnancy bariatric surgery: improved fertility and pregnancy outcome?
- Section 5 Management and policy
- Index
- Plate Section
- References
Summary
Introduction
In this chapter we address the metabolic sequelae of maternal obesity, and by detailing effects on glucose, lipid, and protein metabolism, parallels with type 2 diabetes are highlighted. These similarities and the success of lifestyle intervention strategies for the prevention of type 2 diabetes may provide a road map for the development of strategies to modify maternal hyperglycemia – a key determinant of pregnancy complications.
Maternal metabolism
Lipid metabolism
Lipid metabolism undergoes major adjustment during pregnancy as although there is no change in either basal carbohydrate oxidation or non-oxidizable carbohydrate metabolism there is a significant 50% to 80% increase in basal fat oxidation during pregnancy and also in response to glucose [1]. There is also a marked hyperlipidemia in pregnancy [2–4]. Specifically very low-density lipoprotein (VLDL) triglyceride concentrations increase three-fold from 14 weeks gestation to term [5], with concomitant decreases in hepatic lipase activity [2]. This increase in plasma triglyceride concentration results may drive in the appearance of small, dense low-density lipoprotein (LDL) particles, particularly in late pregnancy [6]. Plasma cholesterol levels rise to a lesser degree due to an early decrease in LDL followed by a modest continuous rise in high-density lipoprotein (HDL) (particularly the HDL-2 subfraction) by over 40% after 14 weeks gestation [5]. HDL cholesterol exhibits a triphasic profile, rising to a peak at 25 weeks, and then declining to 32 weeks with maintenance at this level until term [7]. These changes in lipoprotein concentrations are associated with the progressive increases in estradiol, progesterone, and human placental lactogen [7], and estrogens are known to enhance VLDL production and decrease hepatic lipase activity and may play a key role in the accumulation of triglycerides in lipoproteins of higher density than VLDL [8].
Keywords
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- Information
- Maternal Obesity , pp. 179 - 198Publisher: Cambridge University PressPrint publication year: 2012
References
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