P-141: The pre-cycle blind mock transfer is an inaccurate predictor of anticipated embryo transfer depth

Abstract

The conflicting results found in our literature review prompted us to examine the uterine depth measured at the time of ultrasound guided embryo transfer compared to the anticipated transfer depth determined by the blind pre-cycle mock transfer. We hypothesized that using the blind pre-cycle mock transfer uterine depth was an inaccurate measurement of actual uterine depth at the time of embryo transfer. We planned a retrospective study to assess if the pre-cycle mock transfer measurement of uterine depth changed after gonadotropin stimulation and to evaluate the parameters that were associated with the changes in uterine cavity depth.