I am going into my 2nd trimester and someone recommended taking ds-24 and folic acid instead of taking something like chela-preg pre natal capsules?

Maybe no difference: Women with good nutrition should not feel any differently no matter which prenatal vitamin is taken. Online sources list iron as a Chela-Preg ingredient. Iron helps improve a woman's anemia (increases her blood count) if she is anemic before, during, or after pregnancy. The Folic Acid in both brands helps prevent certain neurological birth defects, when taken before and during early pregnancy.