[Guideline project termination of pregnancy in the first trimester].

The termination of a pregnancy in the first trimester is regulated by law. Guidelines serve the purpose of presenting the current state of medical science in order to enable the best possible care. S3 guidelines represent the highest level of guideline development and contain all elements of systematic development, including systematic research, evaluation of the evidence, and structured consensus-building using formal technology. The existing S2k guideline is to be raised to an S3 level. For this purpose, the Institute for Quality and Efficiency in Health Care (IQWiG) conducted an evidence search on eight central questions. The result showed a predominantly very poor level of evidence. The article describes the development of the S3 guideline and the existing problems and limitations.