Fig. 1From: Sonogram of coccygeus muscle in dairy cows with different gestational agesSonogram of dairy cows with different gestational ages in transrectal B-mode ultrasonography: a non-pregnant, b <1 month pregnant, c 2–3 months pregnant, d postpartum. Note: ute = uterus, lm = lumen, gs = gestational sac, fm = fetal membrane, pl = placenta, Lc = lochia, vu = bladderBack to article page