Results of meta-analysis (random effects model) using different analysis models.

<p>Results of meta-analysis (random effects model) using different analysis models.</p

Distribution and comparison of various clinical parameters between <i>MTHFR</i> genotypes.

<p>Distribution and comparison of various clinical parameters between <i>MTHFR</i> genotypes.</p

Distribution and comparison of various clinical parameters between hyper- and normo-androgenic groups.

<p>Distribution and comparison of various clinical parameters between hyper- and normo-androgenic groups.</p

PRISMA flow diagram.

<p>The flow diagrams shows screening of literature and selection of studies for meta-analysis.</p

Funnel plot of precision by log odds ratio showing the absence of publication bias.

<p>Funnel plot of precision by log odds ratio showing the absence of publication bias.</p

Sensitivity analysis excluding the studies not fitting the Hardy Weinberg equilibrium.

<p>Sensitivity analysis excluding the studies not fitting the Hardy Weinberg equilibrium.</p

Meta-analysis.

<p>Forest plot showing the odds ratio, p value and direction of association between MTHFR 677 C>T polymorphism and PCOS. The Z value shows the degree and direction of the relationship, whereas the P value shows significance of the relationship. The horizontal bar shows the range of OR with a square in the centre, size of the latter is directly proportional to the weight given to each study. The direction of projection of the horizontal bar shows the direction of association.</p

Case-control data included in the meta-analysis.

<p>Case-control data included in the meta-analysis.</p

Trail sequence analysis of the studies included in the meta-analysis.

<p>Trail sequence analysis of the studies included in the meta-analysis.</p