Data collected from delivery records, retrospectively obtained and reviewed, will include: patient's age, race, parity, patient's body mass index (BMI, kg/m2) at the time of delivery, and body weight change during pregnancy (defined as the difference between maternal pre-pregnant body weight and body weight at delivery), as part of the ante-partum information. For the intra-partum information, gestational age at delivery, duration of second phase of labor, use of intravenous oxytocin, episiotomy, cervical laceration (as requiring surgical repair for hemostasis), severe perineal lacerations (defined as third- or fourth- laceration, while mild perineal laceration was defend as first- or second- perineal laceration), vacuum extraction, forceps delivery, use of uterine fundal pressure maneuver were abstracted. All The study Group will followed up for 15 days after delivery Fetal weight was estimated by the combination of biparietal diameter, abdominal circumference and femur length. The mean percent difference between the predicted and actual weight was 9.6% corresponding to a mean overestimation of 294 g or underestimation of 314 g. These values are consistent with most reports in the literature.