A delivery catheter for the introduction of one or more media into a uterus of a patient during an embryo transfer procedure is described, which comprises an outer sheath having a proximal end and a distal end； and, an inner lumen slidably disposed within said outer sheath, said inner lumen having a proximal end, a distal end, and an internal passageway therein for receiving at least one embryo and other media, said inner lumen including at least one visual marker situated on the exterior surface thereof adjacent its distal end indicating a predetermined volume to enable aspiration of an accurate volume of said one or more media into said inner lumen.
