Clinical Research Directory

Inclusion Criteria: All patients in pregnancy, nulliparae, candidates for spontaneous or induced labor, monitored by intrapartum ultrasound, collecting the ultrasound parameters of the labor progress. 1. pregnants in labor, at first pregnancy 2. gestational age ≥37 weeks of gestation Exclusion Criteria: Multiparas who are candidates for cesarean section, premature labor and patients who do not agree to participate in the study (missing data relevant for the study). Exclusion criteria encompassed: breech, transverse, or oblique presentations; twin pregnancies; abnormal placental implantation; HELLP syndrome; coagulation disorders; uterine hyperstimulation (often referred to as "terrified uterus"); non-reassuring fetal heart rate; thick meconium; and cephalopelvic disproportion. 1. Patients who are candidates for cesarean section. 2. Patients in premature labor. 3. Patients who do not agree to participate in the study. 4. Exclusion criteria encompassed: breech, transverse, or oblique presentations; twin pregnancies; abnormal placental implantation; HELLP syndrome; coagulation disorders; uterine hyperstimulation (often referred to as "terrified uterus"); non-reassuring fetal heart rate; thick meconium; and cephalopelvic disproportion 5. Missing data relevant for the study.