We Should Perform a Systematic Evaluation of the Placenta.

Despite its critical importance, the placenta receives substantially less attention during obstetric ultrasound examinations compared to the fetus. The evaluation of the placenta is typically limited to determining its location within the uterus, particularly its relationship to the cervix. Abnormal placenta findings are the result of gross anomalies identified by chance during obstetric examinations, rather than from a systematic evaluation. Here we describe a standardized protocol evaluating four placental regions: 1) the uterine wall/decidua/chorion interface; 2) the amnion/chorion interface; 3) the placental body; and 4) cord insertion and marginal area, which can improve the identification of placental anomalies in all pregnant subjects.