Ae. Czeizel et al., THE EFFECT OF PRECONCEPTIONAL MULTIVITAMIN SUPPLEMENTATION ON FERTILITY, International journal for vitamin and nutrition research, 66(1), 1996, pp. 55-58
A significantly higher rate of conceptions occurred after preconceptio
nal multivitamin supplementation in comparison with a placebo-like tra
ce element supplementation in the Hungarian randomised double-blind, c
ontrolled trial. This difference was explained by 5% shelter time in t
he achievement of conception.