A gynocological cervical Os instrument. The gynecological cervical Os instrument includes a cervical Os finder having a passage for another medical instrument at least partially along the Os finder's length. In some aspects, the passage is only partially along the Os finder's length. The passage may be a groove, and the gynecological cervical Os instrument may include one or more retainers across the groove for the medical instrument. The gynecological cervical Os instrument may include a ramp out of the passage at the end of the passage and one or more bumps on the other end of the gynecological cervical Os instrument opposite the ramp indicative of a size of the gynecological cervical Os instrument. The gynecological cervical Os instrument may be made of a thermoplastic polymer such as polytetrafluoroethylene.
