The uterine speculum (colposcope or vaginal speculum) is an instrument in obstetrics and gynecology that dilates the walls of the vagina to allow the doctor to see and examine the entrance of the uterus.

Screw-type uterine speculums are very practical and preferred by most gynecologists and cytologists.

• Plastic screw: Each uterine speculum has a plastic screw on the side in different colors that distinguish it according to its size.