PT - JOURNAL ARTICLE AU - Parry, Nicola ED - Kanter, Jessica R. TI - Monozygotic Twinning Risk Increases with Day 5 Embryo Transfer and Assisted Embryo Hatching DP - 2014 Jul 01 TA - MD Conference Express PG - 17--17 VI - 14 IP - 7 4099 - http://mdc.sagepub.com/content/14/7/17.1.short 4100 - http://mdc.sagepub.com/content/14/7/17.1.full AB - This article presents results from an 11-year study showing an increased incidence of monozygotic twin pregnancies over the past decade in association with the use of assisted reproductive technology (ART) [Kanter JR et al. Obstet Gynecol 2014]. Results also showed that Day 5 embryo transfer and assisted embryo hatching are associated with an increased risk of monozygotic twinning.