Body fat distribution influences ART outcomes

Area of Science:

• Reproductive Endocrinology
• Obesity and Metabolism
• Infertility Research

Background:

• Body mass index (BMI) is a common obesity measure but lacks specificity regarding body composition and fat distribution.
• Existing anthropometric measures like waist circumference (WC), hip circumference (HC), and waist-to-hip ratio (WHR) have not been extensively applied to assess assisted reproduction technology (ART) outcomes.
• Assessing body composition and adipose tissue distribution may offer superior insights into ART success compared to traditional BMI calculations.

Purpose of the Study:

• To determine if body composition and adipose tissue distribution are more effective than BMI in predicting ART outcomes.
• To investigate the association between various anthropometric measurements and reproductive success in women undergoing fertility treatments.

Main Methods:

• Analysis of five anthropometric measurements in 788 women undergoing controlled ovarian hyperstimulation and in vitro fertilization.
• Comparison of ART outcomes based on body mass index (BMI), waist circumference (WC), and waist-to-hip ratio (WHR).

Main Results:

• Increased body fat, irrespective of measurement method, correlated with poorer reproductive results.
• Eutrophic women with WC < 80 cm demonstrated twofold higher gestation rates (38.9%) compared to those with WC ≥ 80 cm (14.3%).
• Obese women with WHR > 0.85 exhibited inferior outcomes in oocyte retrieval, mature oocyte yield, and fertilization rates compared to those with WHR ≤ 0.85.

Conclusions:

• Body fat distribution, particularly WC, is a more relevant predictor of ART outcomes than BMI.
• Adipose tissue distribution provides critical information for evaluating fertility treatment success.
• Targeting body fat distribution may enhance reproductive outcomes in women undergoing ART.