Three-dimensional printing makes it possible to create patient-specific, complex anatomical geometries that can be used for training, teaching and surgical planning. The human placenta is a vital organ that transports nutrients from the mothers' uterine circulation to the fetus via a complex vasculature. Complications of the fetal vasculature are increasingly being imaged with ultrasound and treated before birth using invasive fetal therapy. There is a need for human placenta training phantoms such as placental anastomoses that occur in monochorionic twin pregnancy and can cause twin-to-twin transfusion syndrome and fetal death, if untreated. In this study we developed two phantoms based on the human placenta using 3D printing technology: an ultrasound imaging phantom and an anatomical teaching model.