Pregnancy is a physiological condition of a woman that lasts from 37 to 42 weeks and is divided into three trimesters. It is also called the "second state" in which numerous psychological, physiological and anatomical changes take place. Physiological changes occur in the respiratory system, cardiovascular system and metabolic and thermoregulatory systems in the pregnant woman's body. In order to increase the weight and growth of the fetus, there are changes in posture that are caused by musculoskeletal changes, and thus various dysfunctions of this system are possible. A very important role in pregnancy is played by a physiotherapist who, with his expertise, performs exercises for the well-being of the pregnant woman and the fetus, with a physiotherapeutic assessment and plan has a favorable effect on eliminating the reduction of symptoms caused by some pathological changes in pregnancy. Education of pregnant women facilitates the implementation of activities of everyday life. Exercise in pregnancy has a beneficial effect on both the pregnant woman and the fetus itself. Pregnancy and exercise require a number of changes and adjustments to body functions such as circulation, respiration, heart rate and energy use. The physiotherapist, with his knowledge of changes in body functions, adjusts the exercise program that is most favorable individually for each pregnant woman. The most common problems in the musculoskeletal system in pregnancy are found in the sacroiliac joints, where due to uterine growth and postural changes, sacroiliac dysfunction occurs, which is often accompanied by symphysis diastase. Through various tests and the expert knowledge of a physiotherapist, a quality physiotherapy intervention can be determined, directed individually to each pregnant woman.