Results 61 to 70 of about 4,512 (194)
Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, Volume 345, Issue 5, Page 456-461, June 2026.ABSTRACT Steroid‐mediated maternal effects are well‐studied as a source of phenotypic variation. In bird eggs, the yolk contains various steroids that can influence embryonic development. However, one complicating factor in understanding how yolk steroids affect development is that the embryo metabolizes yolk steroids to regulate exposure.
Ryan T. Paitz +4 more
wiley +1 more source
, 2017 Despite its conserved role in placenta and umbilical cord formation, the mammalian allantois shows remarkable diversity in size and form as well as in the timing of its appearance and attachment to the chorion.
Waad Hassan +3 more
core +1 more source
Birth Defects Research, Volume 118, Issue 5, May 2026.ABSTRACT Introduction Species differences exist in Fc domain‐containing molecule transfer/biodistribution to the embryo‐fetus during pregnancy. Placentation was reviewed and placental neonatal Fc receptor (FcRn) quantitation in the chorioallantoic placenta (CAP) and/or inverted yolk sac placenta (InvYSP) was investigated across species throughout ...
Christopher J. Bowman +11 more
wiley +1 more source
Clinical Medicine Insights: Case Reports, 2019 The urachus is a vestigial structure of the allantois and cloaca. It involutes as fetal development progresses to become a fibrous cord, which courses between the umbilicus and bladder dome within the retropubic space.
Siu W Lam +2 more
doaj +1 more source
Bowel Ischemia: A Life‐Threatening Complication of an Infected Urachal Cyst in an Adolescent
Clinical Case Reports, Volume 14, Issue 5, May 2026.ABSTRACT While infection is a recognized complication of congenital urachal cysts, progression to an inflammatory phlegmon causing bowel ischemia is an exceptionally rare and life‐threatening event in the pediatric population. We report the case of a 14‐year‐old male with a 7‐year history of an infraumbilical mass who presented with an acute abdomen ...
Sheeraz Ali +7 more
wiley +1 more source
, 2013 In each panel the image on the left is a control and on the right is a stage-matched Tbx4 mutant allantois. (A–E) Expression of ECM genes Vcan, Has2 and Itgα5 was undetectable whereas Colα1(I) and Fn were expressed in Tbx4 mutants.
Ripla Arora (145097) +4 more
core +1 more source
A Rare Cause of Urachal Adenocarcinoma: Urachal Diverticle
Case Reports in Urology, 2013 Urachus is the remnant of the embryologic allantois and the fetal bladder, extending form the bladder roof to the umbilicus. It degenerates in the prenatal period into a tissue band known as the median umbilical ligament. Incomplete degeneration may lead
Tufan Çiçek +4 more
doaj +1 more source
TEM micrographs showing cell layer augmentation in the allantois (a-c) and the chorion (e-f).
, 2016 The mesenchyme (Me) and capillaries (ca) are denoted wherever applicable. a–c: The allantois is made up of a single layer of cells (white arrow) with scanty short microvilli (white arrowheads) at E8 and the mesenchyme has few cells (arrowhead) and cell ...
Andrew Ndegwa Makanya (2591125) +4 more
core +1 more source
Appendicoumbilical Fistula: A Rare Reason for Neonatal Umbilical Mass
Case Reports in Medicine, 2011 The normal umbilicus is a simple structure, but the intrauterine development of the umbilicus is highly complex. Neonatal umbilical mass anomalies usually represent failure of obliteration of the vitelline duct or the allantois which results in ...
M. Cevik, M. E. Boleken, E. Kadıoglu
doaj +1 more source
Urachal adenocarcinoma: a rare case report
Radiology Case Reports, 2017 Urachal carcinoma is a rare and aggressive form of bladder cancer involving the urachus, a fibrous remnant of the allantois that extends from the bladder to the umbilicus.
Bo Bao +2 more
doaj +1 more source