@inbook{1125006283, author={Shireen Madani Sims}, title={Maternal-Fetal Physiology and Placentation}, booktitle={Obstetrics and Gynecology: PreTest® Self-Assessment and Review, 14e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2016}, url={obgyn.mhmedical.com/content.aspx?aid=1125006283} }