The assistance provided by nurses to pregnant women, especially those at high risk, is crucial to guarantee maternal health and good fetal development. Prenatal care is an essential tool in the identification, treatment and control of possible pathologies during pregnancy and postpartum, aiming to reduce morbidity and mortality rates. Recent studies show that, in 2020, approximately 60% of pregnancy-related deaths could have been avoided with adequate prenatal care, especially in high-risk pregnancies. In the state of Acre, between 2016 and 2021, 89 deaths related to pregnancy, childbirth and the postpartum period were recorded, reinforcing the need for prevention policies and specialized care. This study focuses on the role of nurses in basic health units, addressing the complexities of monitoring high-risk pregnancies and presenting the role of this professional in interpreting events and managing frailties. The method applied was a literature review, based on articles and journals from databases such as Scielo, Google Scholar and LILACS. The results demonstrated the importance of prenatal care in UBS and highlighted the protocols followed by nurses to humanize care and improve the quality of care. It is concluded that the continuous training of nurses is vital to guarantee satisfactory results in prenatal care, promoting and preventing complications in the mother-baby binomial.