Factors Affecting Success of Vaginal Birth After Cesarean Section

• Clinical data will be collected from the participants including demographic details such as age, maternal age, parity, BMI, gestational age based on last menstrual period or early ultrasound scans available.
• Full medical and surgical history, previous CS details as an indication, and previous complications.
• Patients' clinical abdominal and per vaginal examination on admission (cervical dilatation, effacement head station, and position).
• CTG attached on admission (to exclude fetal distress).
• Laboratory investigations that will be done before delivery and postpartum, Labor progress on the partogram will be assessed as regard duration of both first and second stages of labor if any instrumental delivery will be done.
• Radiology investigations such as US.
• Records for patients' vital signs, fetal cardiac activity during labor, vaginal bleeding, delivery notes, fetal weight, and 5 minutes APGAR score, and any recorded maternal or fetal complications.
• If failed VBAC: Causes of failure maternal and fetal outcomes will be recorded and immediate CS to be done

Inclusion criteria

• • Age from 20 to 40 years.

• Time interval more than 1.5 years from previous caesarean section.
• Single viable full-term pregnancy in vertex presentation.
• Reactive cardiotocography (CTG) on admission.
• Spontaneous labor onset.
• Clinically adequate pelvis.
• Single fetus
• Average AFI fetus

Exclusion criteria

• • Women with previous upper segment cesarean section or hysterotomy scar.

• Any obstetric complications such as fetal malpresentation, placenta previa, or medical disorders like diabetes mellitus or preeclampsia.
• Presence of any signs and symptoms of scar dehiscence or ruptured uterus, known uterine fibroid or anomaly.
• Suspected fetal macrosomia (weight more than 4 kg).
• Multifetal pregnancy.
• Parturient women who refused the trial of vaginal birth after caesarean section.