Development of specific fetometric formulas of ICC and BP for predicting the parturition date in Maine Coon queens

Abstract

Contents The objective of study was to derive specific growth curves of ICC and BP for Maine Coon. Twenty‐three pregnant queens aged 1–6 years, with body weight of 4.5–7.6 kg, were included in the study. In each queen, serial ultrasonographic examinations of pregnancy were performed through the abdomen with the MyLab Gold Vet scanner with a 6.6–7.5 MHz microconvex probe (Turin, Italy). ICC or BP was measured, depending on the stage of pregnancy. Each examination was regarded as a separate observation. In 18 queens, ICC was measured 33 times, and in 21 queens, BP was measured 60 times. The linear regressions of specific models of ICC and BP in Maine Coon pregnancies and specific formulas for predicting the parturition date in this breed were derived. The ICC formula was: days before parturition (DBP) = −0.79 * mm + 57.9, and the BP formula was: DBP = −1.86 * mm + 49.3. The proposed fetometric formulas of ICC and BP for Maine Coons after application in clinical patients can improve obstetric management in this breed.

Feline breeding and pregnancy management: What is normal and when to intervene

“…31 Formulas have been derived to predict parturition (days before parturition [dBP]), based on the diameter of the gestational sac (inner chorionic cavity) during the first half of pregnancy (days 19-37), and measurement of fetal biparietal diameter from day 38 (see box). 32,33 Their accuracy is dependent on the stage of gestation, and decreases close to term. 34,35…”

“…is approximately 65 days (range 57-72 days), with the majority of parturitions occurring between 61 and 70 days. < DBP = (ICC [mm] -62.03)/1.1 < DBP = (BP [mm] -23.39)/0.47 Specific for Maine coons: < DBP = (-0.79 x ICC [mm]) + 57.9 < DBP = (-1.86 x BP [mm]) + 49.3 DBP = days before parturition; ICC = inner chorionic cavity; BP = fetal biparietal diameterFormulas for predicting parturition in cats32,33 Before any medical treatment during pregnancy, the risk for the fetuses should be considered. Many drugs are recognised as safe to use, whereas others are teratogenic.…”

Reproductive Management in Catteries: Optimising health and wellbeing through veterinarian-breeder collaboration

“…). [150][151][152][153][154][155][156][157] The inner chorionic cavity diameter and the biparietal diameterdepending on gestational age -have been proven to be the most suitable and most frequently applied parameters for prediction of parturition. [152][153][154]156,157 Whereas Beccaglia and Luvoni, 154 in a study looking at whether the accuracy of prediction is affected by the week of pregnancy in which ultrasound is performed, did not elaborate differences between body weight and phenotype (brachycephalic versus dolichocephalic), Socha and Janowski 157 postulated that determination of breed-related formulas might be even more precise in predicting parturition.…”

“…[150][151][152][153][154][155][156][157] The inner chorionic cavity diameter and the biparietal diameterdepending on gestational age -have been proven to be the most suitable and most frequently applied parameters for prediction of parturition. [152][153][154]156,157 Whereas Beccaglia and Luvoni, 154 in a study looking at whether the accuracy of prediction is affected by the week of pregnancy in which ultrasound is performed, did not elaborate differences between body weight and phenotype (brachycephalic versus dolichocephalic), Socha and Janowski 157 postulated that determination of breed-related formulas might be even more precise in predicting parturition. Precision in predicting parturition has been reported to be still further increased when fetal ultrasonographic parameters, such as biparietal diameter, are combined with maternal progesterone analysis, 156 although queens (unlike bitches) are reported to complete delivery without progesterone reaching basal concentrations.…”

Multilayer perceptron and support vector regression models for feline parturition date prediction

“…Then they rapidly dropped to 27–51% and 50–70% in the 9th week—the last week of gestation [ 1 , [3] , [4] , [5] , [6] , [7] , [8] ]. These studies also utilized various SLR formulas, even the unique one specific to a cat breed [ [4] , [5] , [6] , 8 , 9 ]. These findings highlight the insufficiency of the model type and input features utilized in the SLR model, presenting a compelling research area to explore more precise models for this particular task.…”