Exploring the influence of endometritis diagnostic criteria on uterine involution, milk yield and fertility in dairy cows

Table 1 Cervix measurement. measurement.of cervix diameter and diameters of previously pregnant and non-pregnant uterine horns, based on ultrasound examinations performed on Polish Holstein cows in the fourth week postpartum

	Cervix diameter	Previously not pregnant uterine horns diameter	Previously pregnant uterine horns diameter
Model 1	mm ± SD	mm ± SD	mm ± SD
H	35.47 ± 4.72 ^a	28.57 ± 5.22 ^a	30.94 ± 5.16 ^a
SE	36.16 ± 5.07 ^a	28.70 ± 4.57 ^a	31.47 ± 4.58 ^a
PVD1	36.65 ± 4.75 ^a	29.27 ± 5.27 ^a	32.06 ± 5.38 ^a
PVD2	37.85 ± 3.99 ^ab	32.94 ± 4.70 ^b	36.03 ± 5.41 ^b
PVD3	40.41 ± 5.20 ^b	34.00 ± 4.83 ^b	37.96 ± 5.47 ^b
Model 2
H	35.47 ± 4.72 ^a	28.57 ± 5.22 ^a	30.94 ± 5.16 ^a
SE	36.42 ± 4.91 ^a	28.96 ± 4.94 ^a	31.73 ± 5.01 ^a
CE	39.05 ± 4.78 ^b	33.57 ± 4.69 ^b	37.12 ± 5.42 ^b

In Model 1 (n = 223), cows were classified as healthy (H; <5% endometrial polymorphonuclear cells [PMN] and no purulent vaginal discharge [PVD]), subclinical endometritis (SE; ≥5% PMN and PVD0), and various PVD categories (PVD1 with flecks of pus, PVD2 with mucopurulent discharge, or PVD3 with purulent discharge, irrespective of endometrial PMN%). In Model 2 (n = 220), cows were categorized as H (< 5% PMN and PVD0), SE (≥ 5% PMN and ≤ PVD1), and clinical endometritis (CE; ≥5% PMN and > PVD1). Different superscripts (a and b) within columns indicate a significance level of p < 0.05

ISSN: 1746-6148