Michael Chaikof1, Sebastian Hobson2, Mara Sobel2. 1. Department of Obstetrics and Gynecology (Chaikof, Hobson, Sobel), University of Toronto; Department of Obstetrics and Gynecology (Hobson, Sobel), Mount Sinai Hospital, Toronto, Ont. michael.chaikof@mail.utoronto.ca. 2. Department of Obstetrics and Gynecology (Chaikof, Hobson, Sobel), University of Toronto; Department of Obstetrics and Gynecology (Hobson, Sobel), Mount Sinai Hospital, Toronto, Ont.