This book integrates environmental protection, reproductive physiology, reproductive health, integrated traditional Chinese and western medicine treatment, and assisted reproductive technology. It explains the various harms caused by environmental pollution, sexually transmitted diseases and bad lifestyles to human reproduction, and introduces the main assisted reproduction methods today. Technology and its development prospects, as well as some frontier information of medical science and technology at home and abroad, aim to awaken people's awareness of the "danger" and "opportunity" of human reproduction. This is a popular science book that is both scientific, practical and interesting. It can be read by married young people and married and unborn couples, and can also be used as a reference for medical students majoring in reproductive medicine or medical staff engaged in this profession. It helps people to gain in-depth understanding of infertility and improve the knowledge of reproductive medicine.