PT - JOURNAL ARTICLE ED - , TI - After midtrimester amniocentesis the risk of spontaneous pregnancy loss was 6 per 10 000 AID - 10.1136/ebm.12.3.85 DP - 2007 Jun 01 TA - Evidence Based Medicine PG - 85--85 VI - 12 IP - 3 4099 - http://ebm.bmj.com/content/12/3/85.short 4100 - http://ebm.bmj.com/content/12/3/85.full SO - Evid Based Med2007 Jun 01; 12