Advanced ultrasound examination in the management of subfertility.

The development of new ultrasound techniques such as colour power angiography (CPA) and three-dimensional ultrasound may expand the role of ultrasound in the management of the infertile couple. Measurements of follicular blood flow velocities appears to predict the development of a healthy oocyte while high ovarian stromal vascularity is associated with polycystic ovary and the risk of ovarian hyperstimulation syndrome. Three-dimensional ultrasound with CPA provides spatial evaluation of volume flow in pelvic organs which has been used to measure vascular changes in the endometrium and improve the evaluation of tubal patency.