Chemical Teratogens by TK - BMS Year 3 - Biomedical Sciences-unza

Description

These university notes provide a focused examination of chemical teratogens and reproductive toxicology for third-year Biomedical Sciences students. The document defines teratogens as substances that cause birth defects and outlines the historical background of teratology, including pivotal cases like thalidomide, which led to limb abnormalities (amelia) in neonates during the 1960s. It details other significant agents such as alcohol, linked to foetal alcohol syndrome, and diethylstilbestrol (DES), associated with vaginal cancer in exposed offspring. The material explains the causes of abnormal births, including environmental factors and nutritional deficiencies, and covers reproductive safety evaluation methods like multigeneration studies. It distinguishes between key reproductive toxic agents: embryotoxins (e.g., mercury, lead), teratogens, mutagens (e.g., ethidium bromide), and reproductive hazards, explaining their mechanisms and effects on pregnancy across different trimesters. This tertiary-level resource is essential for students and lecturers at institutions like the University of Zambia, offering authoritative revision material for understanding the principles of developmental toxicology and the assessment of chemical safety in professional programmes. Review this detailed guide to enhance your knowledge of reproductive hazards and teratogenic mechanisms.