Is twin pregnancy necessarily an adverse outcome of assisted reproductive technologies?
Joelle Belaisch-Allart Service de Gynécologie obstétrique et Reproduction Humaine, Centre hospitalier Intercommunal site de Sèvres, 141 grande rue, 92 318 Sèvres cedex, France E-mail: joelle.belaisch-allart{at}chi-sevres.fr’ + u + ‘@’ + d + ”//–> Sir, We want to thank van Wely et al. (2006) for daring to publish what many physicians believe privately, but are unwilling to express publicly, concerning twin pregnancy. Single embryo transfer, currently dominating medical journals (Gleicher, 2006), has become the dominant way of thinking. Twin pregnancies are demonized and are now considered an adverse effect of reproductive technology. We used the French IVF register, FIVNAT and the AUDIPOG (2004) (Association of Users of Computerized Files in Perinatology, Obstetrics and Gynecology) database to compare the outcome of IVF/ICSI twins with that of twin pregnancies in the general populaton in France. AUDIPOG was created in 1994, and the network pools data from 100 voluntary maternity units
