Inclusion criteria:
ُSُingleton Pregnant mothers,Normal BMI (19.8-26),Number of deliveries equal to or less 1,Fluency in Persian to understand information,Term pregnancy (37 to 40 weeks) based on ultrasound under 20 weeks,Dilatation 5 cm,Proper uterine contraction in terms of number,Duration and intensity lasting more than 30 seconds and less than ten minutes apart,Regular heart rate,Natural display of the fetus,Spontaneous onset of labor,Do not have any obstetric problems and do not have the disease.
Exclusion criteria:
Patient's disagreement with entering the plan and provisions of the stillbirth consent form,Multiple miscarriages, with abortions,Neonates and congenital anomalies of major (including: life-threatening, need for major surgery, chromosomal trisomies), presence of maternal medical diseases (preeclampsia, thrombophilia, hypertension) and presence of PRROM, HTN, oligohydramenosis, amniotic fluid disorder, Previous cesarean section and use of fetal heart monitor due to fetal distress.