Del'Aguila-Silva Priscila, Dos Santos Fabiana Cirino, Aires Luiz Paulo Nogueira, Uscategui Ricardo Andres Ramirez, Amoroso Lizandra, Vicente Wilter Ricardo Russiano, Feliciano Marcus Antônio Rossi
Departamento de Clínica e Cirurgia Veterinária, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil.
Departamento de Morfologia e Fisiologia Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista "Júlio de Mesquita Filho", Jaboticabal, SP, Brasil.
Anim Reprod. 2023 Apr 21;20(1):e20230006. doi: 10.1590/1984-3143-AR2023-0006. eCollection 2023.
The aim of this study was to evaluate and correlate modifications of vaginal mucous impedance, vulvar temperature and ultrasonographic measurements (echobiometric parameters) to parturition in pregnant Saanen does. 30 does were selected for the study and submitted to an estrus synchronization protocol and natural mating. The females were evaluated daily from Day 143 of pregnancy to parturition. For the sonographic evaluations, the following structures were measured: biparietal diameter, thoracic diameter, abdominal diameter, ocular orbit, kidney length, kidney height, cardiac area, placentome length, cervical measurement and fetal heart rate; by means of two different approaches: transrectal and transabdominal, using a 7.5 MHz linear transducer. The vaginal mucous impedance was assessed using an electric estrous detector and vulvar temperature was measured using a non-contact infrared thermometer. Statistical analysis was performed using the R-project software and the significance level was set at 5% for all tests. 25 Saanen does became pregnant, resulting in 80.33% pregnancy rate. Fetal heart rate was negatively correlated to the hours to parturition (p<0,001; r-Pearson= -0,451), as well as vaginal temperature (p= 0,001; r-Pearson= -0,275), while cervical thickness was positively correlated to hours to parturition (p<0,001; r-Pearson= 0,490). The echobiometric parameters (biparietal diameter, thoracic diameter, abdominal diameter, ocular orbit, kidney length and height, cardiac area, placentome length), as well as vaginal mucous impedance did not vary throughout the timepoints of evaluation and did not correlate to the moment of parturition. It was concluded that the parameters of fetal heartbeat, vaginal temperature and cervical effacement in the last week of pregnancy provide valuable information regarding the proximity of parturition.
本研究的目的是评估怀孕的萨能奶山羊阴道黏液阻抗、外阴温度和超声测量值（回声生物测量参数）的变化，并将其与分娩相关联。选择30只奶山羊进行研究，并使其接受发情同步方案和自然交配。从怀孕第143天到分娩，每天对这些母羊进行评估。对于超声评估，测量以下结构：双顶径、胸径、腹径、眼眶、肾长、肾高、心脏面积、胎盘长度、宫颈尺寸和胎儿心率；采用两种不同的方法：经直肠和经腹，使用7.5MHz线性换能器。使用电子发情检测器评估阴道黏液阻抗，使用非接触式红外温度计测量外阴温度。使用R-project软件进行统计分析，所有测试的显著性水平设定为5%。25只萨能奶山羊怀孕，怀孕率为80.33%。胎儿心率与分娩时间呈负相关（p<0.001；皮尔逊相关系数r=-0.451），与阴道温度也呈负相关（p=0.001；皮尔逊相关系数r=-0.275），而宫颈厚度与分娩时间呈正相关（p<0.001；皮尔逊相关系数r=0.490）。回声生物测量参数（双顶径、胸径、腹径、眼眶、肾长和肾高、心脏面积、胎盘长度）以及阴道黏液阻抗在整个评估时间点均无变化，且与分娩时刻无关。得出的结论是，怀孕最后一周的胎儿心跳、阴道温度和宫颈消退参数提供了有关分娩临近程度的有价值信息。
