the measurement member 102 which relate a measurement or distance in a particularly preferred embodiment the measurement scale 108 includes a plurality of millimeter mm incremental markings and a plurality of centimeter cm incremental markings as shown in fig1 a the measurement scale 108 can be color coded to indicate the relative risks of preterm delivery for a cervix length falling within each respective colored region for example in one embodiment a first zone 132 can include the incremental markings less than 2 cm and can be coded in a first color such as red a second zone 134 can include the incremental markings from 2 to 3 cm and can be coded in a second color such as yellow and the third zone 134 can include the incremental markings from 3 to 5 cm and can be coded in a third color such as green in fig1 a the measurement scale is color coded into three regions that each visually represents the relative risks of preterm delivery for a cervix length falling within the respective region for instance the first zone 132 indicates a shorter cervix and therefore a higher risk of preterm delivery than the second zone 134 which indicates a cervix length that reflects a higher risk of preterm delivery than the green zone 136 a flange 110 that is shaped for non abrasive contact with tissue can be disposed on a distal portion of measuring device 100 the flange can be preferably flat and spherically or conically shaped alternatively however the flange may be any other non abrasive shape to reduce irritation and scraping of the cervical canal fundus of the vagina or perforation of the fundus of the uterus the main body of the flange is also preferably offset from the.