Regular physical exercise reduces the risk of chronic diseases such as type-2 diabetes, osteoporosis, some forms of cancer, atherosclerosis, depression, arthritis, fibromyalgia, varicosity, obesity, fibromyalgia, anxiety, stress and depression. It also improves immune function, body composition, and joint health; prevent low back pain and injury; enhance self image and quality of life. These chronic health impairments can result a person in poor quality of life and premature death. Gestational age women can gain obstetric and general health benefits from exercise. This book includes topics about how exercise can be practiced pregnancy, and lactation. Indications and contraindications of maternal exercise are described in line with guidelines from various institutions such as ACOG, WHO, ACSM. More than eight factors that cause woman to lead sedentary lifestyle are discussed. Lifestyle change such as making daily activities more physical, selection methods of exercise in various maternal periods including menstruations, etc. are dealt. A number of health, and sport science professionals were consulted in addition to several research findings.