A woman who has not given birth before cannot realize when the first signs of early pregnancy appear and how to distinguish them from the onset of the menstrual cycle, and often attributes strange changes in the body to malaise or illness. Moreover, some of the symptoms of pregnancy are really similar to disruptions in the functioning of body systems as a result of stress, hormonal disorders, heavy physical exertion, and the use of potent pharmaceuticals. And menstrual irregularities occur even in healthy women. Therefore, every potential mother needs to learn how to identify the very first signs of early pregnancy, and at the slightest suspicion go to the gynecologist's office.