Ultrasound Evaluation in Female Infertility: Part 2, the Uterus and Implantation of the Embryo.

This article discusses the role of ultrasound in assessing endometrial and uterine factors affecting the implantation of the embryo. Modern ultrasound equipment includes advanced Doppler and three-dimensional facilities that refine our understanding of factors that affect implantation such as endometrial blood flow. Three dimensional scanning is principally used to define the relationship of fibroids to the endometrial cavity, the position of polyps and other anatomic structures relative to the implantation site, to diagnose adenomyosis, to reveal and classify congenital uterine malformations and in the differential diagnosis od ovarian and extraovarian cystic structures in the pelvis.