تعيين شسيوع نمايش بريچ و بررسي تاثير عوامل سن مادر، وزن نوزاد، سن حاملگي و تعداد زايمان در خانم هاي مراجعه كننده براي زايمان به بيمارستان آرش

DETERMINATION OF PREVALENCE OF BREECH PRESENTATION AND EVALUATION OF RELATIONSHIPS BETWEEN BREECH PRESENTATION AND INFANT (BIRTH WEIGHT,GESTATIONAL AGE) AND MATERNAL (MOTHER AGE, PARITY)CHARACTERISTICS OF SINGLETON BIRTHS IN ABASH HOSPITAL

The purpose of this study is to determine the prevalence of breech presentation and asses the corelation between breech presentation maternal age, parity; infantʹs weight and gestational age in addition to characteristics of singleton births at Arash hospital. A population-based case-control (335 breech cases, 441 control and total of 12067 deliveries) was conducted with data collected from the medical records. The results showed the mean maternal age with breech presentation to be 25.07±5.81. However this difference was not significant. Breech in primipara was 47.7% compared to 35.6% cephalic presentation in the control group. Taking odds ratio of 1.65, primparity is considered a risk factor for breech presentation. Mean maternal age was 38.9-!-2.28 in those with cephalic presentation compared to 37.7±3.6 in those with breech presentation. This difference was statistically significant (P <0.001). Mean infantsʹ in the breach group was 2885±691 grams compared to 3231±410 grams in the cephalic group, and the difference was found to be statistically significant (P<0.001). In our study, low birth weight, primiparity and low gestational age influenced the incidence of breech presentat ion. However, accompaniment of advanced age and multiparity were not established with increased incidence of breech contrary to other reports. Overall several different infant and maternal factors appear to increase the risk of breech presentation, suggesting that there may be several different biological mechanisms leading to breech presentation.