Prenatal Diagnosis of the Human Embryo and Fetus

During the prenatal period, several approaches, such as imaging and genetic tests, can be used to identify diagnostic clues. Owing to recent progress in imaging modalities, we can now image smaller embryos and fetuses with a higher resolution. Here, we describe the diagnostic imaging modalities for living or dead embryos and fetuses. In addition, we provide information on the latest genetic testing methods with a focus on both the technical and ethical aspects.