RT Journal Article SR Electronic T1 Higher maternal age was associated with increased risks for fetal death and ectopic pregnancy JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 28 OP 28 DO 10.1136/ebm.6.1.28 VO 6 IS 1 YR 2001 UL http://ebm.bmj.com/content/6/1/28.abstract AB