@inbook{1106708903,
author={Fionnuala M. Breathnach and Fergal D. Malone},
editor={Fleischer, Arthur C. and Toy, Eugene C. and Lee, Wesley and Manning, Frank A. and Romero, Roberto J.},
title={FIRST TRIMESTER SCREENING},
booktitle={Sonography in Obstetrics and Gynecology: Principles & Practice, 7e},
publisher={McGraw-Hill Education},
address={New York, NY},
year={2015},
url={obgyn.mhmedical.com/content.aspx?aid=1106708903}
}