Placek P J, Taffel S M, Smith J C, Maze J M
Am J Public Health. 1981 Nov;71(11):1258-61. doi: 10.2105/ajph.71.11.1258.
National Hospital Discharge Survey data indicate that the overall postpartum sterilization rate per 100 deliveries increased by 75 per cent from 4.0 in 1970 to 7.0 in 1975; by type of delivery, rates rose from 18.0 per 100 cesarean section deliveries and 3.2 for all other deliveries in 1970 to 19.0 and 5.6 respectively in 1975. The South had the highest postpartum sterilization rates overall. Deliveries to older mothers and cesarean section deliveries in hospitals with less than 100 beds were more often characterized by higher sterilization rates.
国家医院出院调查数据显示，每100例分娩的产后绝育率总体上从1970年的4.0上升了75%，至1975年达到7.0；按分娩类型划分，1970年每100例剖宫产分娩的绝育率为18.0，其他所有分娩的绝育率为3.2，到1975年分别升至19.0和5.6。总体而言，南方的产后绝育率最高。高龄产妇分娩以及在床位少于100张的医院进行的剖宫产分娩，绝育率往往更高。
