The objective of the study is to investigate the FRI's ability to identify cases requiring urgent intervention which will present an adverse perinatal outcome (respiratory acidosis, metabolic acidosis, Apgar index, etc.) compared to the classical interpretation of CTG.
Patients whose CTG in labor will be considered non-reassuring will be enrolled and randomized into two groups. The "Fetal Reserve Index" algorithm will be applied to the first group of patients.
The second group of patients will, however, be managed according to the usual protocols internal management.
Women in the active phase of labor who presented when they entered the room I delivered a negative admission test (i.e. a normoreactive CTG according to ACOG) and that subsequently present during labor a diagnosis of category II CTG
Single term pregnancy
Signature of informed consent
Failure to sign the informed consent
Previous caesarean section (TOLAC)
Twin pregnancy
Gestational age <37 weeks