This book covers key areas of Medical Science. The contributions by the authors include Tobacco consumption, garments workers, knowledge, attitude and practice, health hazards, Molecular sociology, COVID-19, lead (pb), heavy metals, pathogens, vitamin D, social activity, Colorimetric assay, decoction, KB cells, HeLa cells, neutral red, proliferation assay, Psidium guajava, Aqueous Extract, Fetal brain, maternal mathematical activities, blood flow, fetal programming, Geometric Activity, Brain activity and blood flow, pulsatility index (PI), peak systolic velocity (PSV), Adipokines, hypertension, leptin, adiponectin, Resistin, Interplay of Adipokines, ELISA, Renal function, lipid profile, glycemic status, Surgically Induced Astigmatism (SIA), pythagorean principle, trigonometric and calculus formulae, astigmatic magnitude and direction, Megakaryocytes, megakaryopoiesis, inflammatory joint diseases, arthritis, Bone Homeostasis, Zidovudine, histopathology, fetus, In-utero, kidney, brain, Hemorrhage, high blood pressure, maternal death, partographe, prenatal consultation, Maternal Mortality, U.H.C Point “G”, Self esteem, emotional health, psychological distress, Patients with Tuberculosis and Fracture, Unconscious, observation, quantum mechanics, psychoanalysis, epistemological reformulation etc. This book contains various materials suitable for students, researchers and academicians in the field of Medical Science.