Palpation of the Uterine Artery.
The character of the blood flow in the uterine artery changes from a pulse to fremitus (Latin: murmur - roar), which is palpable per rectum from the third month of gestation on. The diameter of the uterine artery on the gravid side increases from 3 mm at 3 months, 6 mm at 4 months, 9 mm at 5 months, to 12 mm at 6 months. At 7 months of gestation the contralateral uterine artery also begins to enlarge and become readily palpable. Legend: 1 = dorsal aorta; 2 = ovarian A; 3 = internal iliac A; 4 = uterine A; 5 = pudendal A; 6 = vaginal A.
Source unknown (German textbook)