Role of pelvic ultrasonography in evaluation of symptomatic first-trimester pregnancy

Early identification of an abnormal pregnancy is important. The diagnosis o f ectopic pregnancy before tubal rupture can prevent life-threatening hemor rhage. This article provides a review of the normal development in early pr egnancy and correlates this with ultrasound findings, followed by a structu red approach to the ultrasound examination. The specific findings in early pregnancy are reviewed, and the predictive value of these findings in ident ifying either a normal or abnormal intrauterine pregnancy or an ectopic pre gnancy are discussed.