Hysteroscopy allows a doctor to look inside the womb (uterus). This is done using an instrument called a hysteroscope. The hysteroscope is very slim (about 3 to 5 millimetres in diameter). It's carefully passed through the vagina and neck of the womb (cervix) and into the uterus.
This is a companion discussion topic for the original article at https://patient.info/womens-health/hysteroscopy