Saunders M C, Dick J S, Brown I M, McPherson K, Chalmers I
Lancet. 1985 Oct 12;2(8459):793-5. doi: 10.1016/s0140-6736(85)90792-5.
212 women with twin pregnancies were randomly allocated either to receive advice to rest in hospital from 32 weeks' gestation until delivery, or to be part of a control group in which hospital admission was offered selectively (and, on average, 5 weeks later). Preterm delivery was more common among women admitted routinely for bed rest than among controls, and this difference was unlikely to have occurred by chance. There is at present no scientifically acceptable evidence that this common, disruptive, and expensive obstetric policy does more good than harm.
212名怀有双胎妊娠的女性被随机分配，要么从妊娠32周起接受住院休息建议直至分娩，要么成为对照组，对照组根据情况选择性住院（平均晚5周住院）。常规住院卧床休息的女性中早产更为常见，且这种差异不太可能是偶然发生的。目前没有科学上可接受的证据表明这种常见、具有干扰性且昂贵的产科政策利大于弊。
