Premature birth refers to childbirth occurring before full-term pregnancy. In contrast, the terms miscarriage, full-term birth, and post-term birth are used, differentiated mainly by the gestational weeks. Miscarriage refers to the expulsion of a fetus before 28 weeks of pregnancy, premature birth refers to expulsion between 28 and 36 weeks plus 6 days, full-term birth refers to expulsion between 37 and 41 weeks plus 6 days, and post-term birth refers to expulsion after 42 weeks of pregnancy. The definition of premature birth being set between 28 and 36 weeks plus 6 days mainly stems from the fact that during this time period, the fetus already has a significant chance of survival. However, the overall survival rate is lower than that of a full-term birth. It is crucial to promptly treat the newborn in cases of premature birth, while also preventing complications in the mother.