Antepartum RNs primarily care for pregnant patients experiencing complications before delivery, which includes conducting frequent maternal and fetal assessments, monitoring vital signs, and administering prescribed medications. They collaborate closely with physicians, perinatologists, and other healthcare professionals to promptly respond to changes in patients' conditions. Documentation, patient education about high-risk pregnancy management, and providing emotional support are also key parts of the role. This combination of clinical and interpersonal responsibilities ensures comprehensive, patient-centered care for mothers and their babies during critical periods.