Elective single day 3 embryo transfer halves the twinning rate without decrease in the ongoing pregnancy rate of an IVF/ICSI programme. - Gerris,J.; De Neubourg,D.; Mangelschots,K.; Van Royen,E.; Vercruyssen,M.; Barudy-Vasquez,J.; Valkenburg,M.; Ryckaert,G. (Hum Reprod, 2002)