This abstract has been retracted at the request of the chief editors and authors.
Reason: It has come to our attention that the published abstract and the oral presentation of abstract no. 2 entitled “LMWH vs no treatment in patients with previous preeclampsia or fetal growth restriction plus heterozygous factor V Leiden or prothrombin gene mutations: A randomized trial”, which was presented at the Society for Maternal-Fetal Medicine’s 2006 Annual Meeting, misrepresented the study design. The investigators now disclose that the patients were not randomized. In the words of the investigators, “the subjects treated were those already known to our team, and who had consulted us for pre-conceptional counselling. The choice to offer them treatment with heparin was therefore our therapeutic decision which was explained to these subjects in detail and for which consent was given verbally to us.” “The control group was made up of those women who had followed the same pre-conceptional screening in our Institution, but who were not in a direct care relationship with members of our team.”
