Ultrasonographic and progesterone changes during Days 21 to 63 of pregnancy in queens

Mitacek, María Carla García; Stornelli, María Alejandra; Praderio, Romina Gisele; Sota, Rodolfo Luzbel de la

doi:10.1016/j.theriogenology.2015.06.014

Cited by 10 publications

(33 citation statements)

References 17 publications

(49 reference statements)

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“…In the study of Garcia Mitacek et al. (), accuracy using BPD as well as AD measurements also decreased significantly from week 5 (80–95% and 50–90%) to week 9 (44–65% and 24–35%) of gestation, respectively. Furthermore, while Zambelli et al.…”

Section: Introductionmentioning

confidence: 88%

“…() reported BPD of 2.6 cm and AD of 3.83 cm 60 days after mating in eight domestic queens with a body weight of 3–3.5 kg, Garcia Mitacek et al. () predicted BPD of 2.14 cm and AD of 3.16 cm for the same day of pregnancy in 16 mixed‐breed colony cats with a body weight of 2–4 kg. Estimation of parturition day already seems to be difficult comparing cats of similar weight classes, and may be even more challenging in queens of different breed size and/or with different average kitten weight.…”

Section: Introductionmentioning

confidence: 99%

“…In the event when medical or surgical intervention may become necessary, for example in high‐risk pregnancies, knowledge about the actual length of gestation and thus the maturation status of the foetuses is crucial for optimal management. A full‐length pregnancy in the domestic cat lasts 64–66 days and seems to be also influenced by breed and litter size (Garcia Mitacek et al., ; Musters, de Gier, Kooistra, & Okkens, ; Root Kustritz, ; Sparkes et al., ; Zambelli, Castagnetti, Belluzzi, & Paladini, ). Decreased viability of the kittens is expected if birth takes place before 60 days (Root Kustritz, ).…”

Section: Introductionmentioning

confidence: 99%

“…In the second half of pregnancy, biparietal diameter (BPD), abdominal diameter (AD), gastric diameter and femur length of the foetuses showed the best correlation with gestational age or days before birth (DBB) (Beccaglia et al., ; Beck, Baldwin, & Bosu, ; Garcia Mitacek et al., ; Gatel, Rault, Chalvet‐Monfray, Saunders, & Buff, ; Zambelli & Prati, ; Zambelli et al., ). Gestation length was positively associated with the queen's body weight and negatively with the queen's age and litter size (Gatel et al., ).…”

Section: Introductionmentioning

confidence: 99%

“…Maternal blood progesterone (P4) may be used to estimate parturition date in the queen. On days 63–65 after mating, blood concentration of P4 was in general 4–5 ng/ml (Verhage, Beamer, & Brenner, ), 2.99 ± 1.29 ng/ml one day before (Garcia Mitacek et al., ), and on average 2.2 ng/ml on the day of parturition; in one queen, however, P4 above 10 ng/ml was detected (Schmidt, Chakraborty, & Wildt, ). Progesterone dropped to baseline levels immediately after delivery (Verhage et al., ), although another study described higher than baseline concentrations for a variable time post‐partum (Schmidt et al., ).…”

Section: Introductionmentioning

confidence: 99%

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

Keiser

Reichler

Balogh

2017

Reprod Domestic Animals

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In cats, accuracy of parturition day prediction by ultrasonographic measurement of foetal structures is decreasing towards the end of gestation. Foetal measurements during the last days of pregnancy are scarce. We determined foetal 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. Foetal 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 days 62-63 after the first mating and repeated 24-72 hr 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) Veterinary Research Communications, 32(Suppl 1), S99 and Garcia Mitacek et al. (2015) Theriogenology, 84, 1131. Progesterone was measured at the time of presentation and repeated 24-72 hr later if parturition did not occur. Data were analysed 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 foetal ultrasonography and maternal blood P4 rather than each as a sole predictor of parturition is recommended.

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Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%