Changes in total body composition during normal and diabetic pregnancy. Relation to oxygen consumption

Area of Science:

• Human Physiology
• Metabolic Studies
• Pregnancy Research

Background:

• Body composition changes are critical during pregnancy.
• Understanding these changes is vital for maternal and fetal health.
• Oxygen consumption (V-O2) is a key metabolic indicator.

Purpose of the Study:

• To investigate serial changes in body composition during pregnancy.
• To compare these changes with simultaneous oxygen consumption measurements.
• To differentiate the effects of diet and physiological adaptations on body composition.

Main Methods:

• Measured total body water (TBW) using D2O dilution.
• Calculated total body fat (TBF) and body cell mass (BCM) using established formulas.
• Monitored oxygen consumption (V-O2) in normal and diabetic pregnant women on controlled diets.

Main Results:

• Fat storage depended on caloric intake, similar to non-pregnant states.
• Body cell mass accumulation was largely independent of food intake, relying on pregnancy physiology.
• Diabetic women with insulin deficiency showed disrupted body composition changes, with no net BCM gain.

Conclusions:

• Pregnancy fat storage is primarily diet-dependent.
• Body cell mass accretion is driven by physiological changes of pregnancy, not solely by diet.
• Insulin deficiency in diabetes significantly impairs normal pregnancy-related body composition adaptations.