Eat food, actual food, do it with loved ones, and in a state of relaxation. Then determine how research around supplementation can best support the unfolding of an infinitely complex symphony of information exchange between mom and fetus.
While I know that we can't all afford to move to the pristine wilderness (and that it would quickly stop being pristine!) there are still steps we can all take to make ourselves, our future children, and our environments cleaner.
Birth Story: Ina May Gaskin and The Farm Midwives recounts the history of the natural birth movement in the United States. It is the story of a revolution, initiated in the least likely place imaginable.
Insurance companies have no liability or risk if they chose not to cover prenatal tests. And since health care providers must do these tests, whether they are paid for or not, OB providers and hospitals absorb the cost.