Supported by U.S.P.H.S. grant HD 00975.
Derivation of the vascular elements in the fetal cotyledon of the hemochorial placenta: A contribution to the theory of placental morphogenesis†
Article first published online: 27 JAN 2005
Copyright © 1967 Wiley-Liss, Inc.
The Anatomical Record
Volume 157, Issue 1, pages 43–46, January 1967
How to Cite
Reynolds, S. R. M. (1967), Derivation of the vascular elements in the fetal cotyledon of the hemochorial placenta: A contribution to the theory of placental morphogenesis. Anat. Rec., 157: 43–46. doi: 10.1002/ar.1091570107
- Issue published online: 27 JAN 2005
- Article first published online: 27 JAN 2005
A schematic plan of late developmental organization of the fetal cotyledonary elements of the hemochorial placenta is presented. It involves mechanical shaping by hemodynamics and stretching of the elements involved in the late chorion frondosum stage after the 2nd month of gestation. The result is the fetal cotyledon as described by Wilkin. The components of the fetal cotyledon are derived from differentiated vascular elements in tertiary stem, or anchoring, villi and vascular elements of the blastoderm which are formed by the twenty-first day after ovulation.