A uterine sound is a medical instrument used in gynecological examinations to measure the depth and position of the uterus. It is a thin, flexible metal or plastic rod with calibrated markings along its length. The uterine sound is gently inserted into the uterus through the cervical opening to assess the size, shape, and position of the uterus. It helps healthcare professionals determine the appropriate placement of intrauterine devices (IUDs), perform certain diagnostic procedures, or assess the uterine cavity for abnormalities. The uterine sound is designed to be safe and minimally invasive, with rounded tips to prevent injury to the cervix or uterus. It is an essential tool in gynecology for accurate assessments and procedures relating to the uterus.