Pre pregnancy vitamins can help to safeguard your intake of specific vitamins and minerals when you are planning to conceive. The UK Department of Health recommends taking a supplement containing 400 micrograms of folic acid every day when trying for a baby. Supplemental folic acid increases the folate status of the mum-to-be. Low maternal folate status is a risk factor in the development of neural tube defects in the developing foetus. The mineral zinc is another important nutrient, as it contributes to normal fertility and reproduction.