Used to access the uterine cavity for sonohysterography and to obtain an endometrial biopsy, if indicated, using the same device. The adjustable acorn positioner maintains catheter placement while reducing leakage of instilled saline at the external cervical os. Ink marks in 1 cm gradations up to 10 cm indicate proper catheter positioning. Larger diameter allows for easy passage into the uterus and tissue collection. The catheters round, closed tip eases cervical passage. The large oval sideport facilitates instillation of saline solution and aspiration of endometrial tissue. Intended for one-time use.