You may find the following resources useful:
- Society for Maternal-Fetal Medicine
- American Congress of Obstetricians and Gynecologists
- March of Dimes
- Health Information – National Institutes of Health (NIH)
- The Triplet Connection
- Sidelines National Support Network
- Trisomy 21 – Prenatal Genetic Testing | Sequenom Center for Molecular Medicine
- Pregnancy Complications | March of Dimes