Establishment of a method to predict dystocia due to physical imbalance between foetus and maternal pelvis in Japanese black cattle.
Reprod Domest Anim
; 57(9): 1029-1037, 2022 Sep.
Article
em En
| MEDLINE
| ID: mdl-35662284
ABSTRACT
This study aimed to clarify the relationship between the maternal pelvis and calf size in normal and dystocia groups (Experiment 1) and to establish a method to predict dystocia due to physical imbalance between foetus and maternal pelvis before calving based on the parameters found in Experiment 1 (Experiment 2). In Experiment 1, 26 pairs of dams and their offspring were tested immediately after calving, and various parameters of offspring size and maternal pelvis were measured in normal and dystocia cases. The longitudinal diameter of the maternal pelvis was smaller (p < .01), and ratios of the offspring's birth weight and the width of the hoof crown (hoof width; measured using callipers) to the longitudinal diameter of the maternal pelvis were larger (p < .01) in the dystocia group than those in the normal group. In Experiment 2, 37 cows were tested, and in addition to the measurement items of Experiment 1, the inner pelvic diameter and the foetal hoof width were measured via ultrasonography at 285 days of gestation. The ratio of the internal diameter of the maternal pelvis (longitudinal diameter, transverse diameter and area) to the foetal hoof width was compared and was greater (p < .01) in the dystocia group than in the normal group. In conclusion, the risk of dystocia can be estimated by the ratio of the foetal hoof width to the longitudinal diameter of the maternal pelvis before calving.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doenças dos Bovinos
/
Distocia
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Limite:
Animals
/
Pregnancy
Idioma:
En
Revista:
Reprod Domest Anim
Assunto da revista:
MEDICINA REPRODUTIVA
/
MEDICINA VETERINARIA
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Japão