Header

UZH-Logo

Maintenance Infos

Premature Contractions: Are They Caused by Maternal Standing?


Schneider, K T M; Huch, A; Huch, R (1985). Premature Contractions: Are They Caused by Maternal Standing? Acta geneticae medicae et gemellologiae, twin research, 34(3-4):175-178.

Abstract

In 33 out of 51 women studied in late gestation, the uterus was found to phasically compress the pelvic vessels and impede the venous blood flow during quiet standing. This caused a reduction of the cardiac stroke volume with resultant reduction of systemic blood pressure and a compensatory increased heart rate (range of increases 9-51 beats/min). In all cases uterine contractions (mostly subclinical) coincided with the phase of circulatory readjustment. Apparently, the contracting uterus, by changing its position and/or shape, relieves the venous obstruction and prevents decompensation. In the women displaying the uterine compression syndrome (UCS), uterine activity was markedly increased in standing compared to the left recumbent position.
It was also investigated whether the UCS appeared more often and earlier in gestation in women with twins. In all 9 women with twin pregnancies (mean gestational age 28 5/7 weeks) the UCS associated with uterine contractions was apparent in the standing posture. Although at present no definite conclusions can be reached on the effect on the cervix of these contractions, quiet standing especially in twin pregnancies seems to provoke an increased uterine activity and should therefore be avoided.

Abstract

In 33 out of 51 women studied in late gestation, the uterus was found to phasically compress the pelvic vessels and impede the venous blood flow during quiet standing. This caused a reduction of the cardiac stroke volume with resultant reduction of systemic blood pressure and a compensatory increased heart rate (range of increases 9-51 beats/min). In all cases uterine contractions (mostly subclinical) coincided with the phase of circulatory readjustment. Apparently, the contracting uterus, by changing its position and/or shape, relieves the venous obstruction and prevents decompensation. In the women displaying the uterine compression syndrome (UCS), uterine activity was markedly increased in standing compared to the left recumbent position.
It was also investigated whether the UCS appeared more often and earlier in gestation in women with twins. In all 9 women with twin pregnancies (mean gestational age 28 5/7 weeks) the UCS associated with uterine contractions was apparent in the standing posture. Although at present no definite conclusions can be reached on the effect on the cervix of these contractions, quiet standing especially in twin pregnancies seems to provoke an increased uterine activity and should therefore be avoided.

Statistics

Citations

Dimensions.ai Metrics
10 citations in Web of Science®
11 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

12 downloads since deposited on 18 Oct 2018
12 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, not_refereed, original work
Communities & Collections:National licences > 142-005
Dewey Decimal Classification:Unspecified
Language:English
Date:1 October 1985
Deposited On:18 Oct 2018 10:33
Last Modified:19 Oct 2018 01:17
Publisher:Cambridge University Press
ISSN:0001-5660
OA Status:Green
Publisher DOI:https://doi.org/10.1017/s0001566000004694
Related URLs:https://www.swissbib.ch/Search/Results?lookfor=nationallicencecambridge101017S0001566000004694 (Library Catalogue)

Download

Download PDF  'Premature Contractions: Are They Caused by Maternal Standing?'.
Preview
Content: Published Version
Language: English
Filetype: PDF (Nationallizenz 142-005)
Size: 252kB
View at publisher