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Are fetal ultrasonographic and maternal blood progesterone measurements near parturition reliable predictors of the time of birth in the domestic cat?


Keiser, Ramona; Reichler, Iris M; Balogh, Orsolya (2017). Are fetal ultrasonographic and maternal blood progesterone measurements near parturition reliable predictors of the time of birth in the domestic cat? Reproduction in Domestic Animals:Epub ahead of print.

Abstract

In cats, accuracy of parturition day prediction by ultrasonographic measurement of fetal structures is decreasing towards the end of gestation. Fetal measurements during the last days of pregnancy are scarce. We determined fetal biparietal, abdominal and eye diameter (BPD, AD and ED, respectively) by ultrasonography as well as maternal blood progesterone (P4) within five days of delivery to predict parturition date and calculate accuracy of prediction. Fetal BPD at birth was compared with newborn kitten head diameter (HD). Kitten HD, crown-rump length (CRL) and body weight were compared by breed and gender. Ultrasonography measurements were carried out on the day of parturition in 14 queens, and on day 62-63 after the first mating and repeated 24-72 hours later in ten other cats. Accuracy of parturition day prediction using BPD and AD was determined based on the equations of Beccaglia et al. (2008) and Garcia Mitacek et al. (2015). Progesterone was measured at the time of presentation and repeated 24-72 hours later if parturition did not occur. Data was analyzed with linear regression, T-test, Mann-Whitney U test, one-way ANOVA and Kruskal-Wallis test. There was a moderate relationship between BPD, days before birth (DBB) and litter size. AD and DBB had a low agreement, and ED was not associated with DBB. BPD at birth was significantly related to HD. The accuracy of parturition day prediction using BPD and AD was 27-53% and 17-35%, respectively. Kitten HD was associated with body weight, and both were inversely related to litter size. Newborn biometric measurements differed by breed but not by gender. Progesterone decreased towards parturition and reached 3.18 ± 1.68 ng/mL on the day of delivery. In conclusion, close to birth, the combination of fetal ultrasonography and maternal blood P4 rather than each as a sole predictor of parturition is recommended.

Abstract

In cats, accuracy of parturition day prediction by ultrasonographic measurement of fetal structures is decreasing towards the end of gestation. Fetal measurements during the last days of pregnancy are scarce. We determined fetal biparietal, abdominal and eye diameter (BPD, AD and ED, respectively) by ultrasonography as well as maternal blood progesterone (P4) within five days of delivery to predict parturition date and calculate accuracy of prediction. Fetal BPD at birth was compared with newborn kitten head diameter (HD). Kitten HD, crown-rump length (CRL) and body weight were compared by breed and gender. Ultrasonography measurements were carried out on the day of parturition in 14 queens, and on day 62-63 after the first mating and repeated 24-72 hours later in ten other cats. Accuracy of parturition day prediction using BPD and AD was determined based on the equations of Beccaglia et al. (2008) and Garcia Mitacek et al. (2015). Progesterone was measured at the time of presentation and repeated 24-72 hours later if parturition did not occur. Data was analyzed with linear regression, T-test, Mann-Whitney U test, one-way ANOVA and Kruskal-Wallis test. There was a moderate relationship between BPD, days before birth (DBB) and litter size. AD and DBB had a low agreement, and ED was not associated with DBB. BPD at birth was significantly related to HD. The accuracy of parturition day prediction using BPD and AD was 27-53% and 17-35%, respectively. Kitten HD was associated with body weight, and both were inversely related to litter size. Newborn biometric measurements differed by breed but not by gender. Progesterone decreased towards parturition and reached 3.18 ± 1.68 ng/mL on the day of delivery. In conclusion, close to birth, the combination of fetal ultrasonography and maternal blood P4 rather than each as a sole predictor of parturition is recommended.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Department of Farm Animals
Dewey Decimal Classification:570 Life sciences; biology
630 Agriculture
Language:English
Date:2017
Deposited On:23 Feb 2017 12:49
Last Modified:23 Feb 2017 12:50
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:0936-6768

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