SynthesisFrontiers in endocrinology2023
Effects of vitamin D supplementation on ovulation and pregnancy in women with polycystic ovary syndrome: a systematic review and meta-analysis.
Synthesis in Frontiers in endocrinology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
23 citing papers in PubMed, 2 syntheses or guidelines pooled it, 31 citations in OpenAlex.
- Pooled it
- A meta-analysis of the literature evaluating the impact of vitamin D on female fertility and ovarian reserve function.Revista da Escola de Enfermagem da U S P · 2026Pooled it
- Vitamin D status tracks inflammation perfusion and pregnancy in polycystic ovary syndrome.iScience · 2026Article
- Redox-endocrine triad in PCOS: can vitamin D, myo-inositol, and melatonin synergize as bioactive cocktails?Frontiers in endocrinology · 2026Review
- Association between serum vitamin D levels and polycystic ovary syndrome: a cross-sectional study.Frontiers in nutrition · 2026Article
- Nutrients and bioactive compounds in polycystic ovary syndrome: updated insights into effects and underlying mechanisms.Frontiers in nutrition · 2026Review
- Impact of vitamin D deficiency on defective endometrial decidualization and the repressive role of vitamin D receptor (VDR) in the epigenomic network.bioRxiv : the preprint server for biology · 2025Article
- Efficacy and safety of nutritional supplements in female infertility: a network meta-analysis.Reproductive biology and endocrinology : RB&E · 2025Review
- Integrative Approaches to Ovulation Induction in Polycystic Ovary Syndrome: A Narrative Review of Conventional and Complementary Therapies.Biomedicines · 2025Review
- miR-18a-3p modulates the progression of polycystic ovary syndrome by targeting CITED2 and PI3K/AKT signaling pathway.Journal of endocrinological investigation · 2025Article
- Pharmacological and Non-Pharmacological Interventions for Polycystic Ovary Syndrome (PCOS) in Indian Women: A Systematic Review and Meta-Analysis.Pharmaceuticals (Basel, Switzerland) · 2025Review
- Vitamin D in Reproductive Health Disorders: A Narrative Review Focusing on Infertility, Endometriosis, and Polycystic Ovarian Syndrome.International journal of molecular sciences · 2025Review
- Reducing early pregnancy loss with vitamin DJournal of clinical biochemistry and nutrition · 2025Article
- [Vitamin D deficiency in overweight patients: current strategies and practical aspects].Problemy endokrinologii · 2025Article
- Clinical effectiveness of ethinylestradiol-cyproterone acetate and raloxifene combination therapy in polycystic ovary syndrome-associated infertility.American journal of translational research · 2025Article
- Oocyte and dietary supplements: a mini review.Frontiers in cell and developmental biology · 2025Review
- Associations between serum 25- hydroxyvitamin D concentrations and assisted reproductive technology outcomes in women with polycystic ovary syndrome: a cohort study.Frontiers in endocrinology · 2025Article
- Review
- Mitigating bisphenol A-induced apoptosis in KGN cells: the therapeutic role of 1,25-dihydroxyvitamin DHormones (Athens, Greece) · 2024Article
- Causal association between low vitamin D and polycystic ovary syndrome: a bidirectional mendelian randomization study.Journal of ovarian research · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Objective: To evaluate the effect of vitamin D supplementation on pregnancy and ovulation in patients with polycystic ovary syndrome. Method: We searched Pubmed, Medline (via Ovid, 1974 to 2020), EMBASE (via Ovid, 1974 to 2020), Cochrane Central Register of Controlled Trials (via Ovid), Web of Science, CNKI, WangFang and the Vip database from inception until April 2021. Two researchers independently screened articles, collected data and evaluated the quality, with Review manager 5.3 for meta-analysis. Results: Totally 20 randomized controlled studies with 1961 subjects were included. Meta analysis showed that pregnancy rate [RR=1.44 (1.28, 1.62), p<0.00,001], ovulation rate [RR=1.42 (1.14, 1.78), p=0.002] and matured oocytes rate [RR=1.08 (1.03, 1.13), p=0.002] of vitamin D supplementation group were significantly higher than those of control group. Meanwhile, early miscarriage rate [RR=0.44 (0.30, 0.66), p<0.00,001], androgen level [MD=-2.31 (-3.51, -1.11), p=0.0002], luteinizing hormone [MD=-1.47 (-2.57, -0.36), p=0.009], follicle stimulating hormone [MD=-0.15 (-0.24, -0.05), p=0.002], and premature delivery rate [RR=0.38, 95% CI (0.21, 0.70), p=0.002] were declined significantly than the controls. However, only one article suggested that the progesterone [MD=6.52 (4.52, 8.52), p<0.05] in the vitamin D intervention group was increased. There was no notable difference in the biochemical pregnancy rate [RR=0.95 (0.55, 1.63), p=0.84], gestational hypertension rate [RR=0.40, 95% CI (0.15, 1.11), p=0.08], gestational diabetes mellitus rate [RR=0.27, 95% CI (0.05, 1.39), p=0.11], fertilization rate [RR=1.05 (1.00, 1.10), p=0.04], cleavage rate [RR=1.03 (0.99, 1.06), p=0.17], high-quality embryo rate [RR=1.08 (0.98, 1.20), p=0.10], endometrial thickness [MD=0.10], 77 (-0.23, 1.77), p=0.13], estrogen level [MD=-0.34 (-1.55, 0.87), p=0.59], LH/FSH [MD=-0.14, 95% CI (-0.48, 0.20), p=1.00] and anti-Mullerian hormone [MD=-0.22 (-0.65, 0.21), p=0.32]. Conclusion: Vitamin D supplementation contribute to the higher pregnancy and ovulation rates, and lower androgen, LH, FSH and early miscarriage rates in women with PCOS, regardless of the use of ovulation induction drugs or assisted reproductive technologies. However, no significant improvement was observed in fertilization rate or cleavage rate. Due to the limitation in quality of involved studies, more high-quality RCTs are needed for further validation. Systematic review registration: https://www.crd.york.ac.uk/PROSPERO, identifier CRD42021250284.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.