Observational studyBMC pregnancy and childbirth2025
Does vitamin B12 influence clinical pregnancy outcome in the follicular-phase GnRH agonist protocol?
Observational study in BMC pregnancy and childbirth, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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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
1 citing paper in PubMed.
- The Role of Vitamins in Preconception Care and Infertility Treatment: A Narrative Review.Reproductive medicine and biologyReview
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
Abstract
purposeTo investigate whether vitamin B12 levels affect IVF-ET pregnancy outcomes.
designSingle-center, retrospective, observational study.
designSingle-center, retrospective, observational study.
main outcome measuresThe primary outcome was the clinical pregnancy rate (CPR).
resultsAfter adjusting for Age, BMI, AMH, number of oocytes retrieved, cleavage-stage embryos/blastocysts, and the number of transferred embryos, when the vitamin B12 value was ≤358.7 pg/ml, for every 10 pg/ml increase in the vitamin B12 value, the clinical pregnancy rate increased by 4% (OR=1.04, 95% CI=1.00, 1.08, P=0.03).
conclusionWithin a specific range (≤358.7 pg/mL), serum vitamin B12 levels may modestly contribute to improved clinical pregnancy rates in women undergoing IVF-ET with the follicular-phase GnRH agonist protocol, though further validation is required to confirm its clinical significance.
trial registrationNone.
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