RT Book, Section A1 Cunningham, F. Gary A1 Leveno, Kenneth J. A1 Dashe, Jodi S. A1 Hoffman, Barbara L. A1 Spong, Catherine Y. A1 Casey, Brian M. SR Print(0) ID 1190749634 T1 Implantation and Placental Development T2 Williams Obstetrics, 26e YR 2022 FD 2022 PB McGraw Hill PP New York, NY SN 9781260462739 LK obgyn.mhmedical.com/content.aspx?aid=1190749634 RD 2024/10/08 AB All obstetricians should understand the basic biological steps required for women to achieve pregnancy. Moreover, abnormalities affecting these steps can lead to infertility or pregnancy loss. The biological and molecular changes involved in human zygote implantation and subsequent fetal and placental development are intricate. In the past 50 years, researchers have delineated many of these molecular and physiological events. Yet, much work remains in the continual challenge to improve clinical outcomes.