Check the label of your favorite cereal because manufacturers have been known to stop adding vitamin B12. There are vitamin supplements that do not contain animal products. Zinc is a mineral which is necessary for growth and development. In fact, the recommendation for zinc during pregnancy is twice as high as for non-pregnant women. Good sources of zinc include grains and nuts.
Folic acid is another nutrient whose requirement appears to be substantially increased in pregnancy.
Dark leafy greens are the richest source of folic acid for vegans. Other good sources include whole grains, nuts, legumes and oranges. Moderate to large amounts of alcohol during pregnancy can cause fetal alcohol syndrome, which impairs mental and physical development. Based on what we know, the current recommendation is that women should avoid drinking alcohol during pregnancy. Cigarette smoking has been clearly linked to low birth weight, which increases the infant's chances of having a variety of health problems.