Characteristics and analysis of uterine electromyographic activity in pregnant cows

Gajewski, Zdzisław; Faúndez, Ricardo

doi:10.1016/0093-691x(92)90110-d

Cited by 9 publications

(15 citation statements)

References 22 publications

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“…). The effect of progesterone was minimized because the experiments were conducted only in periods with low progesterone concentrations (<1 ng ml −1 ) and finished immediately after the progesterone concentrationincreased, which corresponds to the results of other authors (Gajewski & Faundez, ; Romero et al . ; Lammers et al .…”

Section: Discussionsupporting

confidence: 81%

“…The contractile activity of the oviduct and the horn of the uterus was defined as a series of stimulating electric potentials with amplitude >5 μV and a duration > 3 s, separated from each of the next series by a time interval no shorter than 5 s (Gajewski & Faundez, ; Gajewski et al . ).…”

Section: Methodsmentioning

confidence: 99%

“…). In pigs, the mean amplitude (in millivolts) and the mean duration (in seconds) of the electrical activity (total duration of all discharges within 30 mi) and root mean square (RMS; in millivolts) were recorded and analysed according to Gajewski & Faundez () and Gajewski et al . () (see Table ).…”

Section: Methodsmentioning

confidence: 99%

“…Results obtained during experiments on this species are treated as referential. Results of recordings of the contractility of the oviduct and uterus obtained using in vitro research techniques are debatable, mainly because they do not take into consideration basic variables, such as the hormonal effects in the blood and the impact of the autonomic nervous system (Gajewski & Faundez, ; Stecco et al . ; Garfield et al .…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of bioelectrical activity of oviducts and uterus during early pregnancy in sows recorded by telemetry method

Pawliński

Domino

Zabielski

et al. 2017

Experimental Physiology

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What is the central question of this study? The aim of present study was to record and analyse the myoelectrical activity in the female pig reproductive tract (uterus and oviduct) during early pregnancy. What is the main finding and its importance? Understanding the contractile activity of the uterus and oviducts is indispensable for understanding the physiological mechanisms as well as all irregularities associated with the period of conception and early pregnancy. The aim of the present study was to record the myoelectrical activity of the reproductive tract in sows during the oestrous phase and early pregnancy via a telemetry recording system. In a total of eight non-pregnant pigs, the bioelectrical activity was recorded through three silicone electrodes sutured on the oviduct (isthmus and ampulla) and the uterine horn. Blood samples were collected to monitor the concentrations of progesterone (P4) and luteinizing hormone (LH). The oestrous cycle was synchronized with equine chorionic gonadotrophin (eCG) and human chorionic gonadotrophin (hCG), and the animals were subjected to artificial insemination. Analysis of the EMG activity of the oviduct and uterus in the oestrous phase and in early stages of pregnancy suggests explicitly that telemetry could enable in vivo assessment of myoelectrical activity of parts of the reproductive system in sows. Off-line analysis of the duration of EMG activity bursts in the uterus, isthmus and ampulla were significantly higher during early pregnancy (phases II and III) than in the oestrous phase. The EMG signals demonstrated low mean amplitudes of activity in the oviduct and uterus during early pregnancy (phases I-III). Significant differences between the root mean square signals were observed in the isthmus and ampulla both during oestrus and in early pregnancy (phase I; P < 0.01). During the oestrous phase, the P4 concentration was estimated at <1 ng ml , whereas the LH concentration was >4 ng ml . In contrast, during early pregnancy, the P4 and LH concentrations were estimated at >4 and <1 ng ml , respectively.

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Section: Discussionsupporting

confidence: 81%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characteristics of bioelectrical activity of oviducts and uterus during early pregnancy in sows recorded by telemetry method

Pawliński

Domino

Zabielski

et al. 2017

Experimental Physiology

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“…In dairy cows, myometrial contractility plays a major role in clearing lochial debris from the uterus after calving (Slama et al, 1991; Hirsbrunner et al, 2002). Normal myoelectrical activity of the uterus is greater during calving and decreases significantly around seven to nine days postpartum (Gajewski and Faundez, 1992; Gajewski et al, 1999). SHT had also been shown to have similar effects in animal models.…”

Section: Discussionmentioning

confidence: 99%

Effects of Sheng Hua Tang on Uterine Involution and Ovarian Activity in Postpartum Dairy Cows

Lee

Chen

et al. 2013

Asian Australas. J. Anim. Sci

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The effects of Sheng Hua Tang (SHT) on uterine involution and ovarian activity were investigated in postpartum dairy cows. SHT (70 g) was given to dairy cows (n = 10) to evaluate its effects for five days from the first postpartum day. Postpartum cows fed with a basal diet without SHT were used as the control group (n = 10). Ultrasounds and blood tests were recorded for four weeks from postpartum day seven with a 3-d interval. The results showed that the areas and diameters of endometria were significantly (p<0.01) reduced in the group that received SHT compared to the control group on the seventh postpartum day. The group that received SHT had an intrauterine fluid volume mean of 1.2±0.6 cm3, which was significantly lower than that of the control group, 2.3±0.8 cm3 (p<0.01) on the 13th postpartum day. In addition, the uterine tension score was a mean of 1.0±0.0 in the group that received SHT, which was also significantly lower than that of the control group, 1.5±0.5 (p<0.01) on the 19th postpartum day. Taken together, the Chinese herbal medicine remedy, SHT, promoted uterine involution and ovarian activity in postpartum dairy cows.

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An application of higher order multivariate cumulants in modelling of myoelectrical activity of porcine uterus during early pregnancy

Domino

Gajewski

2019

Biosystems

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Characteristics and analysis of uterine electromyographic activity in pregnant cows

Cited by 9 publications

References 22 publications

Characteristics of bioelectrical activity of oviducts and uterus during early pregnancy in sows recorded by telemetry method

Characteristics of bioelectrical activity of oviducts and uterus during early pregnancy in sows recorded by telemetry method

Effects of Sheng Hua Tang on Uterine Involution and Ovarian Activity in Postpartum Dairy Cows

An application of higher order multivariate cumulants in modelling of myoelectrical activity of porcine uterus during early pregnancy

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