Text this: Role of polymorphic loci <i>VDR</i> rs10735810, <i>MTHFR</i> rs1801131, <i>MTHFR</i> rs1801133, <i>MTR</i> rs1805087,<i> MTRR</i> rs1801394 AND <i>VEGFA</i> rs3025039 in missed abortion: A prospective cohort study