A new scientific paper has, for the first time, proposed an omega-3 DHA target blood level of 5 percent or higher for pregnant women who want to reduce their risk of preterm birth. Published in the December edition of Nutrients, authors Kristina Harris Jackson, Ph.D., R.D., and William S. Harris, Ph.D., discuss the ramifications of low DHA levels among pregnant women and why they need to strive for a DHA level of 5 percent or above.