With the arrival of a child in the family, life changes for all other members. Pregnancy and childbirth can be stressful and there are many complications that can accompany them, but after that comes the most wonderful time for new parents. During the first 4 weeks of life, the newborn establishes the first contacts with the mother and gets used to life outside the mother's womb and the new environment. There are many signs that tell parents and medical staff whether a child is developing properly. Some of these characteristics are head circumference, heart rate, body weight and length. Sometimes it happens that a child is born too early or too late, and such children need special observation. Before a newborn comes home, parents must provide an environment that is conducive to it. This means choosing the right crib, bathing accessories and clothes, and certainly knowing how to take care of the child with an emphasis on the care of the navel and umbilical wound. After the fourth week of life, the term "infant" is used for the child. For the proper growth and development of the infant, the best choice is mother's milk. Its composition best suits the child's needs, and it also contains immunoprotective substances. On the market, you can find various artificial nutrition that replaces mother's milk if, for any reason, the mother does not breastfeed the child. A baby grows and develops quickly, so it needs a lot of energy. Already around the fourth month of life, supplementary feeding is introduced, starting with fruit juices and porridges. The curiosity of children at this age can sometimes lead to various injuries. Some of the most common are burns, cuts, poisoning, sprains, eye injuries and suffocation. It is important to know how to recognize the symptoms, calm the child down and help him until the ambulance arrives, if it is a major injury. In order to prevent injuries and frequent illnesses in infants, there are preventive measures that strengthen children's immunity. Some of them are sufficient quality sleep, walks and vaccinations. Of course, some diseases cannot be prevented and sometimes children have to stay in the hospital for treatment. Then it is important that the children's department of the hospital fulfills all the prescribed conditions for a child of a certain age and creates a sense of security for the child.