Cited by 243Gynecological conditions and treatmentsReproductive Health and ContraceptionReproductive System and Pregnancy

Contractions of the inner third of the myometrium

de Vries, Karl, Lyons, Edward A., Ballard, Gerry, Levi, Clifford S., Lindsay, Daniel J.·1990·American Journal of Obstetrics and Gynecology

Abstract

Forty-six consecutive endovaginal ultrasound examinations were screened for the presence of myometrial contractions. The study group contained pregnant women up to 10 weeks' menstrual age, nonpregnant, and postmenopausal women. Rhythmic myometrial contractions of the inner myometrial third not previously reported were seen in 35 studies in pregnant, nonpregnant, and postmenopausal women. The contractions involved the inner third of the myometrium in all but two cases. In these two cases, all three muscular layers were involved. The majority of women showed retrograde contractions, with the contraction wave moving from the cervix to the fundus. In menstruating women and one case of abortion, the contractions were antegrade. It is our speculation that these retrograde contractions of the inner myometrial third may be important in sperm transport and for the conservation of early pregnancies within the uterine cavity.

Integrity signals

Registry

Crossref · 10.1016/0002-9378(90)90983-e

Cites

13 of 13 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The non-pregnant uterus is constantly active throughout the reproductive period of life and is subjected to mechanical strain.

    “It became evident that the non-pregnant uterus is constantly active throughout the reproductive period of life and thereby, like other mechanically active organs of the body such as the skeletal and the cardiovascular systems, respectively, rather inevitably subjected to mechanical strain.”

Cites

Flagged first, then by citations

2 of the 15 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
de Vries, K., Lyons, E. A., Ballard, G., Levi, C. S., & Lindsay, D. J.
Affiliations
Health Sciences Centre (CA)
Corresponding author
Lyons, Edward A.
Venue
American Journal of Obstetrics and Gynecology
Publisher
Elsevier BV
Published
1990-03
Volume
162
Issue
3
Pages
679-682
ISSN
0002-9378 (ISSN-L)
OpenAlex
W2073730670
Cited by
243
References
15
Citations by year
2026: 2 · 2025: 3 · 2024: 6 · 2023: 3 · 2022: 1 · 2021: 8 · 2020: 10 · 2019: 4 · 2018: 9 · 2017: 15 · 2016: 9 · 2015: 9 · 2014: 11 · 2013: 9 · 2012: 6
FWCI
1.89
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Obstetrics and Gynecology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Obstetrics and Gynecology › Gynecological conditions and treatments
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Health and Contraception
  • Life Sciences › Immunology and Microbiology › Immunology › Reproductive System and Pregnancy
Keywords
myometrial contraction, transvaginal ultrasound, pregnancy, menstruation, postmenopausal women, sperm transport, uterine motility
MeSH terms
Adult, Aged, Female, Humans, Menopause, Pregnancy, Pregnancy Complications, Reference Values, Twins, Ultrasonography, Uterine Contraction

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review