Influence of Prenatal Aerobic Exercise on Fetal Morphometry

Area of Science:

• Obstetrics and Gynecology
• Maternal-Fetal Medicine
• Exercise Physiology

Background:

• Prenatal exercise is encouraged for maternal health.
• Limited data exists on the specific effects of aerobic exercise on fetal development.
• Understanding fetal morphometrics is crucial for assessing growth and health.

Purpose of the Study:

• To investigate the impact of supervised prenatal aerobic exercise on fetal morphometrics.
• To assess outcomes at 36 weeks of gestation.

Main Methods:

• A 24-week randomized controlled trial comparing aerobic exercise (EX) to stretching/breathing (CON).
• Included healthy singleton pregnancies aged 18-40 with BMI 18.5-34.99 kg/m².
• Measured estimated fetal weight, ponderal index, abdominal circumference, and body composition at 36 weeks, adjusting for third-trimester weight gain.

Main Results:

• No significant differences were observed between the EX and CON groups in EFW, PI, AC, AAWT, fat mass, percent body fat, or fat-free mass.
• Statistical analyses (Spearman rank correlations) showed no significant associations after adjusting for third-trimester weight gain.

Conclusions:

• Moderate-intensity aerobic exercise during pregnancy is not associated with select fetal morphometrics at 36 weeks gestation.
• Postnatal development may reveal differences, suggesting further research into infant tissue composition.
• Investigating cellular signaling pathways in adipose and skeletal muscle development is recommended.