Teenage pregnancy is a social issue worldwide, and various assumptions suggest negative health impacts due to adolescent pregnancy. The objective of this research is to explore the adverse effects on infants born to teenage mothers. Data from the 2017 Indonesia Demographic and Health Survey (IDHS) involving 2862 childbirths from women aged 15-24 are utilised. Chi-square tests and logistic regression are employed. The birth rate among teenage women is 370 (12.93%), with the majority residing in rural areas (55.2%). After adjusting for sociodemographic factors and adequacy of Antenatal Care (ANC) visits, compared to births from adult women (20-24 years), births from teenage women (15-19 years) are associated with an increased likelihood of diarrhoea (AOR=0.728, 95% CI: 0.555-0.954). Infants born to specific age groups of teenage mothers (17-18 years) maintain a probability of diarrhoea (AOR=0.643, 95% CI: 0.444-0.933) and Low Birth Weight (LBW) (AOR=1.887, 95% CI: 1.218-2.926). Teenage pregnancy, particularly at specific age ranges, increases the risk of diarrhoea in infants and LBW.