How you prepare
By Mayo Clinic staffYou don't need to do anything special to prepare for first trimester screening. You can eat and drink normally before both the blood test and the ultrasound exam.
References
- Canick JA, et al. First trimester and integrated screening for Down syndrome and trisomy 18. http://www.uptodate.com/home/index.html. Accessed March 8, 2010.
- Benacerraf BR. Sonographic findings associated with aneuploidy. http://www.uptodate.com/home/index.html. Accessed March 8, 2010.
- Chervenak FA, et al. Ethical considerations in first-trimester Down syndrome risk assessment. Current Opinion in Obstetrics and Gynecology. In press. Accessed March 8, 2010.
- Kagan KO, et al. Screening for trisomy 21 by maternal age, fetal nuchal translucency thickness, free beta-human chorionic gonadotropin and pregnancy-associated plasma protein-A. Ultrasound in Obstetrics & Gynecology. 2008;31:618.
- Screening for birth defects. American Congress of Obstetricians and Gynecologists. http://www.acog.org/publications/patient_education/bp165.cfm. Accessed March 8, 2010.
- Routine tests in pregnancy. American Congress of Obstetricians and Gynecologists. http://www.acog.org/publications/patient_education/bp133.cfm. Accessed March 8, 2010.
- Harms RW (expert opinion). Mayo Clinic, Rochester, Minn. April 11, 2010.

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