Folate deficiency is a low level of the type of Vitamin B "folic acid" in the body.
Anemia, certain medicines, drinking too much alcohol, eating overcooked fruits and vegetables and other factors can contribute to folate deficiency.
So, it is true that pregnant women who smoke or abuse alcohol during their pregnancy often have folate deficiencies. That;s why pregnant women should be counseled about the risks of smoking and alcohol and drug use.