Cardiotocography (CTG) monitoring is primarily used to assess fetal well-being by continuously recording the fetal heart rate and uterine contractions. It is commonly indicated in cases of suspected fetal distress, such as abnormal fetal movements, reduced fetal heart rate variability, or concerning clinical signs suggesting hypoxia. CTG helps detect signs of fetal hypoxia or acidosis early, allowing timely intervention to prevent adverse outcomes. While conditions like maternal hypertension and gestational diabetes pose risks, CTG is specifically employed when there is suspicion of compromised fetal oxygenation or distress.

Reference: Williams Obstetrics, Cunningham et al., 25th Edition.