Predictors of spontaneous reduction in multiple pregnancies conceived following assisted reproductive technology

In multiple pregnancies conceived following IVF, occurrence of SR is relatively common. Increasing number of ET and EMT measuring <10 mm are identified as independent predictors of likelihood of SR. While advancing age, body mass and baseline E2 levels were associated with likelihood of SR, these associations disappeared on adjusted analyses. The observed relationship between EMT and SR is novel: the underlying mechanisms are unclear and merit further investigation.