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. Smoking should also be avoided during pregnancy.
Caffeine is more controversial.
It is probably wisest to limit or avoid caffeine-containing beverages such as coffee, tea and cola. If you are a teenager, you will need extra food so that your growth can continue even while you are pregnant. Morning Sickness Morning sickness is a common complaint especially early in pregnancy. Each woman has a variety of ideas for controlling nausea. Eat 5 or 6 small meals a day.