American Journal of Obstetrics and Gynecology
The umbilical cord twist: Origin direction, and relevance
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Antenatal umbilical coiling index in gestational diabetes mellitus and non-gestational diabetes pregnancy
2018, Taiwanese Journal of Obstetrics and GynecologyCitation Excerpt :Coiling is a unique and obvious feature of the human umbilical cord. The etiology, origin and development of this coiling is still the subject of debate [2,5] and whether it represents a genetically or an acquired phenomenon [6]. Coiling of umbilical vessels develops as early as 28 days after conception and is present in about 95% of fetuses by 9th weeks of conception [5].
Morphoelastic rods Part II: Growing birods
2017, Journal of the Mechanics and Physics of SolidsCitation Excerpt :Flagella are another example of well-studied filaments whose structure and response derive from internal coupled sub-filaments organised in the near universal 7+2 pattern (seven microtubules on a circle with two internal microtubules) (Calladine, 1982; Kamiya et al. 1979; Srigiriraju and Powers, 2005; Gadêlha et al., 2013). Other examples include the microtubules of axons (Stephen and Peter, 2012), the triple helix arrangement of arteries and veins in umbilical cord (Lacro et al. 1987; Goriely, 2004), the collagen fibers in arteries (Goriely and Vandiver, 2010; Holzapfel and Ogden 2010), and the muscle groups of octopus arms (Levinson and Segev, 2010b) and elephant trunks (Kier and Smith, 1985). Typically in these systems the different sub-filaments grow (or equivalently contract by muscle action) and remodel at different rates and therefore develop different unstressed configurations that are incompatible with the geometry of the structure.
Prediction of postnatal abnormal umbilical cord coiling by antenatal evaluation in pregnant women: Diagnostic accuracy study; a systematic review
2023, Journal of Obstetrics and Gynaecology ResearchDoppler Indices of the Fetal Middle Cerebral and the Umbilical Arteries in Pregnancies at High Risk Followed Up for Suspected Fetal Growth Restriction
2023, International Journal of Anatomy and ResearchUltrasonographic study of umbilical cord twist direction during second trimester
2022, Journal of Maternal-Fetal and Neonatal MedicineA Review of Biomechanics Analysis of the Umbilical–Placenta System With Regards to Diseases
2021, Frontiers in Physiology
Supported in part by United States Public Health Service Grant 5T32 AM07318-09 and by a grant from Share, Inc.
Presented at the David W. Smith Workshop on Malformations and Morphogenesis, Burlington, Vermont, August 11–14, 1986.