This book investigates the evolutionary origins, biological function, and immunological paradox of the human placenta. Author Y.W. Loke, a distinguished expert in reproductive immunology, utilizes his extensive research background to explain how this organ functions as a bridge between mother and fetus. He presents a framework that examines the placenta not merely as a supportive structure, but as an invasive tissue that challenges traditional biological understanding of maternal-fetal tolerance.

Experts and readers alike recognize this text as a highly accessible yet scientifically rigorous introduction to a specialized field of biology. It is frequently cited for its ability to distill complex immunological concepts into a narrative that remains engaging for both students and interested laypeople.