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Ultrasound Reproducibility Study

Overview

We have recently shown that small placental size and shape strongly correlates with adverse outcomes in pregnancy, including perinatal death and preterm delivery. However, the values that correspond to a "normal" placenta in low-risk, healthy women is unknown. Therefore, the objective of this study is to define the cut-off values for normal placenta size, such that we can diagnose an under-developed placenta.  In addition, patients will be scanned by both an ultrasound technologist and a maternal fetal medicine fellow using different scanning modes to determine the degree of agreement between the sonographers, and the optimal scanning mode for accurate results.

Information for Patients

If you have any questions about your rights as a research subject, you may contact Dr Ron Heslegrave, Chair of the Research Ethics Board at (416) 586-4875.