Before the hysteroscopy, the gynaecologist will measure the pre-operative degree of cervical dilatation by passing Hegar dilators through the cervix in ascending order starting with a size two millimetres. The size of the largest dilator passed into the cervical os without subjective resistance felt by the operator will be recorded as the preoperative degree of dilatation. If there is resistance with Hegar dilator size two millimetres, the result will be recorded as < 2. Adverse events such as superficial cervical lacerations, false passage of the cervix during cervical dilatation, and perforation of the uterus will be recorded.