3 D ultrasound and Doppler examination
OtherEndometrial thickness was measured in the longitudinal plane at the widest anteroposterior diameter with a trans-vaginal 2D ultrasound, and then 3D mode was then activated with power Doppler setting for this study standardized using a frequency at 4-9 MHZ pulse repetition frequency at 0.5KHz gain at-3.0 and wall motion filter at 1. The sub-endometrial region was considered to be within 3 mm of the originally defined myometrial-endometrial contour. The endometrial volume (EV) and 3D power Doppler indices below the endometrium were measured using the automated VOCAL™ for the 3D power Doppler histogram analysis