Fedrick J, Yudkin P
Br Med J. 1976 Mar 27;1(6012):738-40. doi: 10.1136/bmj.1.6012.738.
The secular trends in induction in 111 818 births over eight years in the largely rural areas of Oxfordshire and west Berkshire were analysed. Although the induction rate started to rise only in 1969, the forceps and episiotomy rates had been increasing throughout, but both procedures were always twice as prevalent in induced as in non-induced cases. The proportion of women given an anaesthetic was also consistently higher in induced cases, but that of women with long labours fell considerably over the period. The reduction in stillbirth rate was more apparent in induced than in non-induced births.
对牛津郡和西伯克郡广大农村地区八年间111818例分娩的引产长期趋势进行了分析。尽管引产率直到1969年才开始上升，但产钳和会阴切开术的比率一直在上升，而且这两种手术在引产病例中的发生率始终是非引产病例的两倍。引产病例中接受麻醉的女性比例也一直较高，但在此期间，产程长的女性比例大幅下降。引产分娩中死产率的下降比非引产分娩中更明显。
