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Gestational Diabetes Research and Management / Ovarian Function and Disorders · Journal article
Frontiers in Public Health · September 10, 2026
Early or partial results. Treat as a signal, not a conclusion.
This is a published protocol for a planned multicenter, randomized comparison of calorie-restricted diet versus metformin as pre-treatment interventions prior to ovulation induction in women with PCOS and overweight/obesity. The trial has not yet reported results; it describes the intended design and rationale for studying live birth and pregnancy outcomes over a 12-week intervention period.
Multicenter, randomized (1:1) comparative effectiveness trial. Women with polycystic ovary syndrome and overweight/obesity. Intervention: Calorie-restricted diet administered for 12 weeks prior to ovulation induction. Compared with: Metformin administered for 12 weeks prior to ovulation induction. Multicenter; specific number of sites and countries not stated..
This is a published protocol for a planned multicenter, randomized comparison of calorie-restricted diet versus metformin as pre-treatment interventions prior to ovulation induction in women with PCOS and overweight/obesity. The trial has not yet reported results; it describes the intended design and rationale for studying live birth and pregnancy outcomes over a 12-week intervention period.
Safety was not reported in the material analysed. Check the source before drawing any conclusion about harm.
This protocol describes a future trial addressing a gap in evidence for pre-treatment strategies to optimize PCOS fertility. Results, once available, may inform whether calorie restriction or metformin should be prioritized ahead of ovulation induction in overweight/obese women with PCOS.
This is a published protocol for an upcoming multicenter RCT; no results are presented, only the study design and rationale for a planned comparison of diet versus metformin in PCOS.
As stated by the source record.
Quoted from the source exactly as published.
This protocol describes a future trial addressing a gap in evidence for pre-treatment strategies to optimize PCOS fertility. Results, once available, may inform whether calorie restriction or metformin should be prioritized ahead of ovulation induction in overweight/obese women with PCOS.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
What is missing. This record has no key findings. That is a gap in the analysis, not a judgement about the study.
Background Polycystic ovary syndrome (PCOS) significantly impairs physical and mental health, quality of life, and fertility in women of reproductive age. Strategies to enhance fertility in PCOS have been prioritised in International Guidelines. Whilst Guidelines recommend Letrozole in first line ovulation induction (OI), therapeutic interventions to optimise endocrine and metabolic PCOS features prior to OI have not been adequately researched despite potential to improve live birth and pregnancy outcomes. Whilst both a calorie-restricted (CR) diet and metformin interventions may offer benefits in the context, evidence is limited including for live birth rates, and pregnancy outcomes. Therefore, this study will aim aims to compare the effects of a CR diet versus metformin on live birth, endocrine, reproductive, and metabolic parameters as well as pregnancy outcomes in women with PCOS and overweight/obesity. Method This multicenter, randomized (1:1) comparative effectiveness trial will evaluate and compare the effects of a CR diet versus metformin, administered for 12 weeks prior to OI, on live birth, endocrine, metabolic, reproductive, and pregnancy outcomes in women with PCOS and overweight/obesity. The primary analysis will follow the intention-to-treat principle, including all participants who underwent randomization. Discussion This trial investigates the comparative efficacy of a CR diet versus metformin over a 12-week period prior to OI therapy in women with PCOS and overweight/obesity. Early therapeutic intervention holds significant potential to disrupt the pathophysiological cycle characterized by hyperandrogenism, excessive adiposity, and insulin resistance for improving fertility and pregnancy outcomes. Clinical trial registration ClinicalTrials.gov, identifier NCT06049186.
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