Polycystic ovary syndrome (PCOS) is a common endocrine disorder and a leading cause of infertility in reproductive-aged women. The source study assessed the prevalence of vitamin D deficiency among infertile women with PCOS and investigated its relationship with subfertility. The authors report a high burden of low vitamin D levels in this clinical population and suggest that vitamin D status could represent a potentially modifiable factor in the management of PCOS-related infertility.
This investigation was a cross-sectional study conducted at the Department of Infertility, Bangladesh Medical University (BMU), between November 2019 and April 2025. The analytic sample comprised 155 infertile women aged 18–40 years who met the revised Rotterdam criteria (2003) for PCOS. Participants with other known causes of infertility were excluded. The report identifies the institutional setting and enrollment timeframe but does not provide full details of participant recruitment procedures in the abstract.
Clinical, biochemical, and metabolic data were collected for enrolled participants. Serum 25-hydroxyvitamin D [25(OH)D] concentration was used to categorize vitamin D status with cutoff values reported in the abstract: deficiency defined as <20 ng/ml, insufficiency as 20–29 ng/ml, and sufficiency as >29 ng/ml. The study also recorded hormonal profiles, measures of glucose metabolism, and calculated HOMA-IR to assess insulin resistance. Specific assay methods, timing of sampling, and laboratory reference ranges were not detailed in the abstract.
The mean age of participants was 28.34 ± 3.5 years, and mean body mass index (BMI) was 23.46 ± 3.2 kg/m². Primary subfertility was present in 69.68% of participants (n = 108).
Vitamin D status in the cohort was as follows:
These findings indicate that the majority of infertile women with PCOS in this sample had either deficient or insufficient serum 25(OH)D.
Metabolic measures reported in the abstract included a mean HOMA-IR of 1.88, which the authors interpret as indicating prevalent insulin resistance within the study population. Glycemic control markers showed that most participants were normoglycemic, with a mean HbA1c of 5.42%. The abstract reports these summary measures but does not provide subgroup analyses correlating vitamin D categories with HOMA-IR, HbA1c, or other hormonal parameters.
The authors conclude that there is a high prevalence of vitamin D deficiency and insufficiency among infertile women with PCOS, with particularly high representation among those with primary subfertility. They suggest that vitamin D status may be a modifiable factor in the management of PCOS-related infertility and imply potential value in screening and addressing low vitamin D levels in this patient group.
The abstract provides core descriptive results but does not report several methodological details commonly needed to evaluate causality and generalizability. Specifically, the abstract does not state statistical methods, effect size estimates, confidence intervals, or whether analyses adjusted for potential confounders such as age, BMI, seasonality, sun exposure, dietary intake, or socioeconomic status. It also does not report on selection methods beyond exclusion of other known causes of infertility, nor does it present longitudinal follow-up or intervention data to test whether correcting vitamin D status alters fertility outcomes. Where the source abstract omits these elements, they were not reported in the source.
In this single-center cross-sectional sample of 155 infertile women with PCOS evaluated at Bangladesh Medical University, nearly half had vitamin D deficiency and another 41% had insufficiency.
Routine assessment of serum 25(OH)D could be considered in infertile patients with PCOS, recognizing that the present report is descriptive and does not establish causality or treatment effect.
Further research, including controlled intervention trials and analyses adjusted for confounders, is needed to determine whether vitamin D repletion improves fertility or metabolic outcomes in women with PCOS. The abstract did not report such randomized or longitudinal data.
Note: All numerical values, definitions, diagnostic criteria, and conclusions in this summary are taken from the source abstract. Additional methodological details and full statistical results were not provided in the source abstract.