Inclusion criteria:
Consent to participate in the research
Gravid 1to3
From the time of admission for delivery to 6 cm dilatation
Mother's age between 15 and 45 years
singleton pregnancy
live fetus
Gestational age 37 to 42 weeks (based on the first day of the last menstrual period or ultrasound of the first trimester)
Cephalic presentation
Normal fetal heart rate (110-160)
Exclusion criteria:
History of any incision on the uterus
Indication for caesarean section (fetal distress, prolapse of the umbilical cord, diagnosis of absolute pelvic stenosis by the doctor)
Known medical diseases based on the patient's file (including history or current suffering from any systemic diseases such as diabetes, high blood pressure, heart, kidney, nervous, liver, digestive, respiratory, thyroid disease)
Mother's psychological problems in the last 6 months
Having an abnormal fetus or intrauterine growth restriction
High-risk pregnancy (pre-eclampsia, placenta previa, Placental abruption, chorioamnionitis, placenta accreta, placenta previa)