Relation between fetal arterial and oxytocin-induced uterine contractions in pregnant sheep

1984 ◽  
Vol 62 (10) ◽  
pp. 1337-1340 ◽  
Author(s):  
Stephen J. Lye ◽  
Mary E. Wlodek ◽  
John R. G. Challis
Keyword(s):  
Positive Relationship ◽  
Late Pregnancy ◽  
Oxygen Electrode ◽  
Experimental Paradigm ◽  
Uterine Activity ◽  
Significant Positive Relationship ◽  
Uterine Contractions ◽  
Intrauterine Pressure ◽  
Pregnant Sheep ◽  
Maximum Decrease

The relation between oxytocin-induced type A uterine contractions and fetal arterial [Formula: see text], measured continuously with an intravascular oxygen electrode, was studied in nine chronically catheterized sheep during late pregnancy. Oxytocin provoked dose-related increases in intrauterine pressure (IUP) and decreases in fetal [Formula: see text]. There was a significant positive relationship between changes in IUP and the maximum decrease in fetal [Formula: see text] (average r = 0.696, df = 92; P < 0.001). We conclude that changes in uterine activity contribute to transient fetal hypoxemia, and that administration of exogenous oxytocin provides an experimental paradigm to examine the consequences of this relationship.

POSSIBLE ROLE OF UTERINE CONTRACTIONS IN THE SHORT-TERM FLUCTUATIONS OF PLASMA ACTH CONCENTRATION IN FETAL SHEEP

1985 ◽  
Vol 106 (2) ◽  
pp. R9-R11 ◽  
Author(s):  
S.J. Lye ◽  
M.E. Wlodek ◽  
J.R.G. Challis
Keyword(s):  
Percentage Change ◽  
Plasma Acth ◽  
Short Term ◽  
Fetal Sheep ◽  
Uterine Activity ◽  
Fetal Plasma ◽  
Uterine Contractions ◽  
Intrauterine Pressure ◽  
Acth Concentration

ABSTRACT Uterine contractions, induced by the administration of oxytocin to sheep between d 123-144 of pregnancy, were associated with a mean transient decrease in fetal PaO2 of 2.8 mm Hg within 5 min. These changes were associated with a rapid increase in the concentration of ACTH in fetal plasma. There was a significant (P<0.05) increase in the percentage change (+40 to +47%) over basal ACTH levels in fetal plasma at +5, +15 and +20 min after oxytocin. Administration of saline had no significant effect on intrauterine pressure, fetal PaO2 or fetal plasma ACTH levels. We speculate that increases in uterine activity and/or transient decreases in fetal PaO2 may contribute to short-term fluctuations in plasma ACTH in fetal sheep.

scholarly journals Development of Myometrial Electrical Activity during the First Half of Pregnancy in the Sheep

1984 ◽  
Vol 37 (3) ◽  
pp. 153 ◽  
Author(s):  
JN Sigger ◽  
R Harding ◽  
A Bailey
Keyword(s):  
Electrical Activity ◽  
Progressive Increase ◽  
Myoelectrical Activity ◽  
Plasma Progesterone ◽  
Uterine Activity ◽  
Uterine Contractions ◽  
Pregnant Sheep ◽  
Low Amplitude

Uterine myoelectrical activity was recorded in seven pregnant sheep covering the period between 13 and 75 days post-coitum. Activity in the myometrium was present at day 13 and took the form of intermittent spikes of low amplitude. Bursts of spikes of irregular duration became noticeable between days 25 and 40 but most were not coordinated throughout the myometrium. Coordinated bursts of myoelectrical activity, which could be recorded at several sites simultaneously, first appeared between 40 and 65 days. These bursts had similar characteristics to the myoelectrical activity associated with uterine contractions during the last third of gestation. The myoelectrical activity showed a progressive increase in amplitude during the first half of gestation. There was no relationship between plasma progesterone levels and the increase in amplitude or appearance of coordinated bursts of uterine activity.

PARTURITION IN THE GOAT: PLASMA CONCENTRATIONS OF PROSTAGLANDIN F AND STEROID HORMONES AND UTERINE ACTIVITY DURING LATE PREGNANCY AND PARTURITION

1976 ◽  
Vol 68 (3) ◽  
pp. 383-389 ◽  
Author(s):  
I. UMO ◽  
R. J. FITZPATRICK ◽  
W. R. WARD
Keyword(s):  
Steroid Hormones ◽  
Plasma Concentrations ◽  
Late Pregnancy ◽  
Experimental Period ◽  
Significant Decline ◽  
Progesterone Concentration ◽  
Uterine Activity ◽  
Uterine Contractions ◽  
Prostaglandin F

SUMMARY Changes in plasma concentrations of hormones and uterine activity associated with spontaneous parturition in the goat were examined. No change in oestradiol-17β concentration was detected during the experimental period, but oestradiol-17α consistently increased in concentration 3–4 days before parturition. This was followed by an increase in prostaglandin F two days later, while a pre-partum decline in progesterone concentration occurred 18–20 h after the significant increase in prostaglandin F. The onset of uterine contractions coincided with a significant decline in progesterone concentration and a period of continually rising prostaglandin F and oestradiol-17α concentrations. Uterine activity expressed in Montevideo units did not change until 10–8 h before foetal expulsion. These results support the hypothesis that in the goat the elevated prepartum concentration of prostaglandin F brings about luteolysis and a subsequent decline in progesterone concentration.

ESTIMATION OF INTRAUTERINE PRESSURE FROM ELECTROHYSTEROGRAPHY USING HILBERT PHASE SLIPS AND STATISTICS METHOD

2017 ◽  
Vol 17 (06) ◽  
pp. 1750089 ◽  
Author(s):  
ZIDUO YANG ◽  
RENHUAN YANG ◽  
YAOSHENG LU
Keyword(s):  
Median Filter ◽  
Motion Artifacts ◽  
Detection Accuracy ◽  
Prognostic Information ◽  
Uterine Activity ◽  
Uterine Contractions ◽  
Intrauterine Pressure ◽  
Signal Segment ◽  
Low Sensitivity ◽  
Phase Slips

Prognostic information during pregnancy can be obtained by monitoring maternal uterine activity. Tocodynamometry (TOCO) is widely used to assess the uterine activity today but it has been found that it has very low sensitivity. Another method to assess the uterine activity is intrauterine pressure catheter (IUPC) which is accurate but highly invasive. Electrohysterogram (EHG) measured from abdominal surface is a noninvasive method to detect uterine contractions. To reduce motion artifacts of intrauterine pressure (IUP) estimated from EHG signal and further improve the accuracy of contractions detected by IUP estimation, we propose a method to divide the EHG signal into segments by using Hilbert phase slips. Standard deviation (STD) was used to estimate IUP from each EHG signal segment and median filter was used to remove the motion artifacts. The method we proposed was compared with other four methods from literatures. The proposed method results in a higher contractions detection accuracy of EHG-based IUP estimation and a higher correlation coefficient with the IUPC signals compared to other methods which demonstrated the capabilities of the proposed method in reducing motion artifacts of IUP estimation based on abdominal EHG.

Relationship of Love, Affect and Wellbeing

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Dr. Thiyam Kiran Singh ◽  
Aastha Dhingra
Keyword(s):  
Positive Affect ◽  
Positive Emotions ◽  
Positive Relationship ◽  
Interpersonal Relationship ◽  
Significant Positive Relationship ◽  
Young Females ◽  
Close Friendship ◽  
Major Facilitator ◽  
Relationship Of ◽  
The Relationship

Love is more than a close friendship. It acts as a major facilitator of interpersonal relationship. Love is positive in nature and leaves a positive affect on every individual. An individual in love not only feels positive but spreads positivity around. They smile, be kind to other people, behave compassionately with everyone. If the person is happy then he is likely to be psychologically and emotionally healthy. The current study aimed at understanding the relationship between love, affect and wellbeing among young females aged between 20-25 years. The study reported a significant positive relationship between love and positive affect with the significant correlation of 0.29 at 0.05 levels (p<0.05). It was also found a significant positive relationship between love and wellbeing with the significant correlation of 0.58 at 0.01 level (p<0.01). This means that people in love experience positive emotions and healthy wellbeing. The correlation between love and negative affect came out to be insignificant. The correlation turned out to be -0.13. This means that people in love do not experience negative emotions.

Organization-Based Self-Esteem Affects Employees' Exchange Relationship Perceptions and Extrarole Behavior

2016 ◽  
Vol 44 (3) ◽  
pp. 509-517 ◽  
Author(s):  
Yanhan Zhu
Keyword(s):  
Social Exchange ◽  
Positive Relationship ◽  
Mainland China ◽  
Negative Relationship ◽  
Self Esteem ◽  
Moderating Effect ◽  
Exchange Relationship ◽  
Significant Positive Relationship ◽  
Significant Negative Relationship ◽  
Practical Implications

The 2 types of exchange relationship perceptions—social exchange relationship perceptions (SERPs) and economic exchange relationship perceptions (EERPs)—constitute the primary concept for understanding individual behavior in the workplace. Using a sample of 581 employees from Mainland China, I explored the effects of SERPs and EERPs on employee extrarole behavior (ERB), as well as the moderating effect of organization-based self-esteem (OBSE) on the relationships between SERPs and ERB, and between EERPs and ERB. The results revealed a significant positive relationship between SERPs and ERB, a significant negative relationship between EERPs and ERB, and a significant moderating effect for OBSE. Theoretical and practical implications of these findings are discussed.

scholarly journals Managers and Organizational Citizenship Behavior

2016 ◽  
Vol 21 (1) ◽  
pp. 14-20
Author(s):  
Mihaela Man
Keyword(s):  
Organizational Citizenship ◽  
Big Five ◽  
Organizational Citizenship Behavior ◽  
Positive Relationship ◽  
Citizenship Behavior ◽  
Five Dimensions ◽  
Significant Positive Relationship ◽  
The One ◽  
The Relationship ◽  
Persistence Factors

Abstract In this research on the one hand we analyzed the relationship that exists in terms of motivational persistence and the Big Five dimensions and, on the other hand, organizational citizenship behavior (OCB). The results show that the conscientiousness has been identified as being in a significant positive relationship with OCB. This result is consistent with the data provided by previous researchers. The results also indicate that three conscientiousness facets are in a positive relationship with OCB. These three conscientiousness facets are self-efficacy, cautiousness and orderliness. Agreeableness was not identified as being associated with OCB. At the level of the relationship between motivational persistence factors and OCB, we have identified a significant positive relationship with only one factor: current purpose pursuing. The OCB model has two variables that work best as predictors: high scores with regard to current purpose in terms of the pursuing-motivational persistence factor, and low scores in terms of the imagination-facet of openness to experience.

Total Dissolved Solids as a Predictor of Lake Biomass and Productivity

1983 ◽  
Vol 40 (1) ◽  
pp. 92-95 ◽  
Author(s):  
E. E. Prepas
Keyword(s):  
Chlorophyll A ◽  
Significant Relationship ◽  
Positive Relationship ◽  
Biomass Productivity ◽  
Total Dissolved Solids ◽  
Fish Production ◽  
Dissolved Solids ◽  
Significant Positive Relationship ◽  
Morphoedaphic Index ◽  
Shield Lakes

Total dissolved solids (TDS) and chlorophyll a were not related in 25 lakes which were all off the Precambrian Shield. Both on-shield and off-shield lakes were included in the previous reports which showed a significant relationship between TDS and productivity. When data from on-shield and off-shield lakes were analyzed separately, there was no significant positive relationship between TDS and lake biomass or productivity. It was also shown that mean depth ([Formula: see text]) was as good a predictor of fish production as the TDS: [Formula: see text] ratio, the morphoedaphic index.Key words: TDS, biomass, productivity, morphoedaphic index, chlorophyll a, lakes

Relationship between clinical anger and suicidal ideation among people with physical disabilities

2021 ◽  
Vol 71 (10) ◽  
pp. 2442-2444
Author(s):  
Naila Andleeb ◽  
Sadaf Ahsan ◽  
Sadaf Zaheer ◽  
Farhana Sajjad
Keyword(s):  
Spinal Cord ◽  
Suicidal Ideation ◽  
Data Collection ◽  
Positive Relationship ◽  
Physical Disabilities ◽  
Artificial Limbs ◽  
Significant Positive Relationship ◽  
Physically Disabled ◽  
People With Physical Disabilities ◽  
Mental And Physical Health

Present research was intended to examine the association between suicidal ideation and clinical anger among the physically disabled. The Purposive Convenient study was conducted at Artificial Limbs Centre, Fauji Foundation Hospital Rawalpindi from February 2016 to November 2016. The modified scale for suicidal ideation and the clinical anger scale were used for data collection. Sample comprised of 150 physically disabled individuals including 87 (56%) males and 63 (42%) females.  Findings revealed that suicidal ideation had significant positive relationship with clinical anger and females were significantly higher in clinical anger and suicidal ideation as compared to males. Furthermore,results revealed higher mean scores on clinical anger by the participants having the problem of spinal cord 26.10±9.25 and suicidal ideation is higher in persons having problem of polio 15.87±9.41as compared to other physical disabilities. The study highlighted the need develop and enhance mental and physical health. Continuous...

The Macroeconomic Determinants and FDI: Evidence from 14 International Alliances

2021 ◽  
Vol 9 (2) ◽  
pp. 69-82
Author(s):  
Sujan Chandra Paul ◽  
Md Harun Or Rosid ◽  
Mohammad Rakibul Islam ◽  
Refat Ferdous
Keyword(s):  
Unemployment Rate ◽  
Positive Relationship ◽  
Robust Regression ◽  
Negative Relationship ◽  
African Union ◽  
G7 Countries ◽  
Significant Positive Relationship ◽  
Brics Countries ◽  
Arab League ◽  
Asean Countries

This study investigates the relationship between Foreign Direct Investment (FDI) and some macroeconomic variables such as Gross Domestic Product (GDP), Gross Capital Formation (GCF), Agriculture, Forestry, and Fishing (AFF), Industry, Import, Export, Inflation and Unemployment rate. Panel Data of 14 regional alliances countries from 1990-2018 were collected from The World Bank website. Robust regression models are used in this study. This research found that GDP had significant positive relationship with FDI in all regions except Arab League, EU and G7 countries. GCF had significant positive relationship with FDI in Arab League, BRI, GATT, NAFTA countries & negative relationship in APEC, G7 countries. AFF had significant positive relationship with FDI in BRICS, GATT countries & negative relationship in African Union, ASEAN, BIMSTEC, BRI, BRICS, SAFTA countries. Industry had significant positive relationship with FDI in African Union, BRI, NAFTA, OECD countries and negative relationship in BRICS, G7, G20 countries. Import had significant positive relationship with FDI in African Union, APEC, Arab League, ASIAN, BRI, G7, G20, GATT countries and negative relationship in BRICS countries. Export had significant positive relationship with FDI in BRICS countries and negative relationship in African Union, ASEAN, BRI, G20, GATT, OECD, SAFTA countries. Inflation had significant positive relationship with FDI in GATT, SAFTA countries and negative relationship in African Union, APEC countries. Unemployment rate had significant positive relationship with FDI in African Union, BRI, BRICS, EU, G20, GATT, OECD, SAFTA countries and negative relationship in ASEAN countries.

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