Fig. 3
From: Sonogram of coccygeus muscle in dairy cows with different gestational ages
The average thickness of the perineal tissue between the sacrum and ischium bones (a) and the average intensity of coccygeus muscle (b) in dairy cows with different gestational ages and postpartum, (inset b) the normalized intensity of coccygeus muscle, horizontal scanning (blue dashed line, R 2 = 0.976) and vertical scanning (red solid line, R 2 = 0.969). TB = non-pregnant, B < 1 = pregnant less than 1 month, B2–3 = 2–3 months pregnancy, PP = 2 weeks postpartum