The intrapartum fetal monitoring is part of the tests to assess the fetal well-being. It is an easy, cheap, reproducible and non-invasive method without adverse effects or contraindications. The main objective of this method is to assess the fetal status during the obstetric labor, identifying the fetus that probably could have alterations. It is determined for alterations in the next variables: [A] Frequency, variability and decelerations of the fetal cardiac rhythm [B] Fetal movements. [C] Changes in the cardiac activity according to the uterine activity. The findings allow classifying the fetal status in three categories. And in this way, the adequate measures could be established before irreversible lesions and death could occur in the fetus. Rev.cienc.biomed. 2015;6(1):170-178 KEYWORDS Cardiotocography; Fetal Monitoring; Heart fetal rate; Obstetric labor.