Purpose: to investigate the safety, effectiveness and acceptabilityof the termination of high risk pregnancies (less than 70 days) with mifepristone and misoprostol.
研究目的：研究停经70天以内的高危人流对象早孕药流的安全性、有效性及可接受性。
2
An introduction is made of the importance ofacceptabilityrisk research and the principles for determining it and a summary is made of the factors affecting acceptabilityrisk.