Effect of sow parity on vaginal electrical impedance

Rezac, Petr; Kukla, Radovan; Pöschl, M.

doi:10.1016/s0378-4320(02)00089-1

Cited by 13 publications

(9 citation statements)

References 28 publications

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“…In agreement with our previous finding (Řezáč et al. 2002), the data in this study showed that primiparous sows had less dramatic impedance changes in the vagina during the peri‐oestrous period compared with sows from parities 2 to 5.…”

Section: Discussionsupporting

confidence: 93%

“…1989; Dusza et al. 1996; Řezáč et al. 2002) that demonstrate that vaginal impedance in the preovulatory period of the oestrous cycle undergoes considerable changes in pigs, but none of them examined impedance changes in the vagina in relation to the interval between weaning and the onset of oestrus.…”

Section: Discussionmentioning

confidence: 99%

“…Although the changes of vaginal impedance during the porcine oestrous cycle are physiologically sound, the main problem appears to be the wide fluctuation of its values (Řezáč et al. 2002).…”

Section: Discussionmentioning

confidence: 99%

“…This is one of the potential causes of increased impedance variability in the vagina. A possible solution of the problem is recording the lowest impedance value within a defined region of the vagina (Řezáč et al. 2002).…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, small attention has been devoted to the causes of impedance variation. It was found that the parity of sows (Řezáč et al. 2002) and the location of probe (Řezáč et al.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Weaning to Oestrus Interval and Equine Chorionic Gonadotropin on Vaginal Electrical Impedance During Peri‐oestrus in Sows

Rezac

Borkovcová

Křivánek

2009

Reprod Domestic Animals

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The influence of weaning to oestrus interval, its interaction with parity and equine chorionic gonadotropin (eCG) on changes of vaginal impedance in sows after weaning was examined. The impedance measurements were carried out by a four-terminal method. Sows were monitored for oestrus via exposure to a sexually mature boar. The interval from weaning to oestrus was longer in primiparous than multiparous sows (p<0.01). A significant negative correlation was found between the interval from weaning to oestrus and parity. Repeated measures analysis showed that the interval from weaning to oestrus and parity and their interactions had a significant effect on the vaginal impedance in peri-oestrus. The vaginal impedance during pro-oestrus gradually decreased in all groups of sows with the weaning to oestrus interval from 4 to 8 days (p<0.05). In the subsequent period, the vaginal impedance increased and was significantly lower from 1 to 3 days after oestrus onset in sows with the weaning to oestrus interval 7-8 days than 4-6 days. Similarly, the vaginal impedance during pro-oestrus gradually decreased in all groups of sows with parity 1-5 (p<0.01). In the next period, the vaginal impedance increased and was significantly lower from 2-3 days after oestrus onset in sows of parity 1 than parity 2-5. Repeated measures analysis showed that eCG treatment had a significant effect on the vaginal impedance in peri-oestrus. Sows treated with eCG displayed the decrease and increase of vaginal impedance due to oestrus onset earlier than untreated sows. The results indicate that the weaning to oestrus interval, its interaction with parity and eCG markedly affect the vaginal impedance in sows during peri-oestrus.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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