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Prediction of parturition time in queens using radiography and ultrasonography

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Abstract
This study investigated the prediction of parturition in queens, as well as the effects of the queens' age and weight and the litter size on the accuracy of the prediction. A prospective study was performed in 24 purebred queens of 11 different breeds, all in normal body condition, using radiographic and ultrasonographic measurements of foetal femoral length (FL) and biparietal diameter (BPD) of fOEtal skull that apply to different breeds. Pregnant queens with aborted or malformed foetuses were excluded. The examinations were performed up to three times during the second half of pregnancy; litter size was obtained with radiography, and FL and BPD measurements were taken of each foetus using both radiography and ultrasonography. The maximal FL and the transversal BPD were recorded for each foetus. Radiography showed the number of foetuses accurately but did not allow accurate prediction of time of parturition. However, ultrasonography did establish the best predictive model according to the data with the FL. This model corresponded to the formula Y=37.864-0.193xFL+1.227xW-0.615xLS-0.832xA using the FL (10(-1)mm), litter size (LS, number of foetuses per queen) and maternal parameters (weight (W, kg) and age (A, years)). Time to parturition correlated positively with the queen's weight and negatively with her age (P<0.01). The ultrasonographic FL associated with pregnancy and maternal factors appeared to be an accurate model to predict parturition.
Keywords
CONCEPTUS, LENGTH, DOGS, DOMESTIC CAT, PREGNANCY, ULTRASOUND, MATERNAL OBESITY, FETAL BIOMETRY, GESTATIONAL-AGE, CATS FELIS-CATUS

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Chicago
Gatel, Laure, D Rault, K Chalvet-Monfray, Jimmy Saunders, and S Buff. 2015. “Prediction of Parturition Time in Queens Using Radiography and Ultrasonography.” Anatomia Histologia Embryologia 44 (4): 241–246.
APA
Gatel, L., Rault, D., Chalvet-Monfray, K., Saunders, J., & Buff, S. (2015). Prediction of parturition time in queens using radiography and ultrasonography. ANATOMIA HISTOLOGIA EMBRYOLOGIA, 44(4), 241–246.
Vancouver
1.
Gatel L, Rault D, Chalvet-Monfray K, Saunders J, Buff S. Prediction of parturition time in queens using radiography and ultrasonography. ANATOMIA HISTOLOGIA EMBRYOLOGIA. 2015;44(4):241–6.
MLA
Gatel, Laure, D Rault, K Chalvet-Monfray, et al. “Prediction of Parturition Time in Queens Using Radiography and Ultrasonography.” ANATOMIA HISTOLOGIA EMBRYOLOGIA 44.4 (2015): 241–246. Print.
@article{8098025,
  abstract     = {This study investigated the prediction of parturition in queens, as well as the effects of the queens' age and weight and the litter size on the accuracy of the prediction. A prospective study was performed in 24 purebred queens of 11 different breeds, all in normal body condition, using radiographic and ultrasonographic measurements of foetal femoral length (FL) and biparietal diameter (BPD) of fOEtal skull that apply to different breeds. Pregnant queens with aborted or malformed foetuses were excluded. The examinations were performed up to three times during the second half of pregnancy; litter size was obtained with radiography, and FL and BPD measurements were taken of each foetus using both radiography and ultrasonography. The maximal FL and the transversal BPD were recorded for each foetus. Radiography showed the number of foetuses accurately but did not allow accurate prediction of time of parturition. However, ultrasonography did establish the best predictive model according to the data with the FL. This model corresponded to the formula Y=37.864-0.193xFL+1.227xW-0.615xLS-0.832xA using the FL (10(-1)mm), litter size (LS, number of foetuses per queen) and maternal parameters (weight (W, kg) and age (A, years)). Time to parturition correlated positively with the queen's weight and negatively with her age (P{\textlangle}0.01). The ultrasonographic FL associated with pregnancy and maternal factors appeared to be an accurate model to predict parturition.},
  author       = {Gatel, Laure and Rault, D and Chalvet-Monfray, K and Saunders, Jimmy and Buff, S},
  issn         = {0340-2096},
  journal      = {ANATOMIA HISTOLOGIA EMBRYOLOGIA},
  keyword      = {CONCEPTUS,LENGTH,DOGS,DOMESTIC CAT,PREGNANCY,ULTRASOUND,MATERNAL OBESITY,FETAL BIOMETRY,GESTATIONAL-AGE,CATS FELIS-CATUS},
  language     = {eng},
  number       = {4},
  pages        = {241--246},
  title        = {Prediction of parturition time in queens using radiography and ultrasonography},
  url          = {http://dx.doi.org/10.1111/ahe.12130},
  volume       = {44},
  year         = {2015},
}

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