Examinees and methods: The study included 98 newborns treated at the Department of Neonatology and
Intensive Treatment of newborns of the Children's Diseases of the University Clinical Hospital in Mostar in one year period (2016). The parameters of newborns (gender, birth weight, gestational age, the age of the newborn at the time of occurrence of hypocalcaemia, lowest serum calcium levels, IUGR, pathological conditions: asphyxia, jaundice, sepsis, perinatal infection, RDS, urinary tract infection, other mineral dysbalances (Mg, Na, Glucose), and mother (age, type of birth, medication, illness: hypertension, diabetes, infection before delivery) were observed.
