This book addresses the complexities of growth and maturation, structural and functional developments as well as differentiations of the human fetus. Many of the authors are part of the Institute of Post-Graduate Medical Education and Research (IPGMER), whose research into human foetuses has generated many studies on the fetus, ranging from the morphometry and growth of organs, the DNA and RNA to different proteins and enzymes. The data collected over many decades provides a deep insight into the growth and development of the human fetus, its aberrations and implications for understanding the intricacies and complexities of growth regulation up to twenty weeks of gestation. The editors bring together this extensive research from IPGMER, in addition to astute and precision research from global leaders in the fields of genetics, proteomics stem cell biology, endocrinology and molecular biology. Human Fetal Growth and Development – First and Second Trimesters is a pioneering work, stimulating further allied research in this area, and will be of interest to gynecologists, pediatricians, obstetricians, neonatologists, endocrinologists, reproductive and molecular biologists, and all students of medicine at all levels.