Department of Anatomy, Pathology, and Veterinary Clinics, Faculty of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, Brazil.
Department of Veterinary Clinics, Faculty of Veterinary Medicine and Animal Science, Paulista State University (Unesp), Botucatu, Sao Paulo, Brazil.
Reprod Domest Anim. 2024 Jun;59(6):e14621. doi: 10.1111/rda.14621.
Estimating the parturition date in dogs is challenging due to their reproductive peculiarities that. Ultrasonographic examination serves as a tool for studying embryo/foetal biometry and estimating the time of parturition by measuring foetal and extra-foetal structures. However, due to reproductive differences among various dog breeds, such estimates may have a non-significant pattern, representing inaccuracies in the estimated date of birth. This study aimed to monitor pregnant Toy Poodle bitches and establish relationships between ultrasonographically measured foetal and extra-foetal dimensions and the remaining time until parturition. Eighteen pregnant Toy Poodle bitches were subjected to weekly ultrasonographic evaluations and measurements of the inner chorionic cavity diameter, craniocaudal length (CCL), biparietal diameter (BPD), diameter of the deep portion of diencephalo-telencephalic vesicle (DPTV), abdominal diameter, thorax diameter (TXD), placental thickness and the renal diameter (REND). These parameters were retrospectively correlated with the date of parturition and linear regressions were established between gestational measurements and days before parturition (DBP). All analyses were conducted using the Statistical Package for Social Sciences (IBM® SPSS®) program at a 5% significance level. The foetal measurements that showed a high correlation (r) and reliability (R) with DBP were BPD [(DBP = [15.538 × BPD] - 39.756), r = .97 and R = .93], TXD [(DBP = [8.933 × TXD] - 32.487), r = .94 and R = .89], DPTV [(DBP = [34.580 × DPTV] - 39.403), r = .93 and R = .86] and REND [(DBP = [13.735 × REND] - 28.937), r = .91 and R = .82]. This statistically validates the application of these specific formulas to estimate the parturition date in Toy Poodle bitches.
由于犬类的生殖特点，估计其分娩日期具有挑战性。超声检查可用于研究胚胎/胎儿生物计量学，并通过测量胎儿和胎儿外结构来估计分娩时间。然而，由于不同犬种的生殖差异，这些估计可能没有显著的模式，这代表了预产期的不准确。本研究旨在监测怀孕的玩具贵宾犬，并建立超声测量的胎儿和胎儿外尺寸与分娩前剩余时间之间的关系。对 18 只怀孕的玩具贵宾犬进行每周超声评估和内绒毛腔直径、颅尾长（CCL）、双顶骨直径（BPD）、大脑间脑囊深度直径（DPTV）、腹部直径、胸径（TXD）、胎盘厚度和肾脏直径（REND）的测量。这些参数与分娩日期进行回顾性相关，并在妊娠测量值和分娩前天数（DBP）之间建立线性回归。所有分析均使用社会科学统计软件包（IBM® SPSS®）程序在 5%的显著性水平下进行。与 DBP 相关性高（r）和可靠性（R）的胎儿测量值为 BPD[（DBP=[15.538×BPD]-39.756），r=.97，R=.93]、TXD[（DBP=[8.933×TXD]-32.487），r=.94，R=.89]、DPTV[（DBP=[34.580×DPTV]-39.403），r=.93，R=.86]和 REND[（DBP=[13.735×REND]-28.937），r=.91，R=.82]。这在统计学上验证了这些特定公式在估计玩具贵宾犬分娩日期中的应用。
