Rockefeller Foundation Fellow in Reproductive Biology, Cambridge University (1970–1971)
The origin of equine endometrial cups. II. Invasion of the endometrium by trophoblast
Version of Record online: 27 JAN 2005
Copyright © 1973 Wiley-Liss, Inc.
The Anatomical Record
Volume 177, Issue 4, pages 485–501, December 1973
How to Cite
Allen, W. R., Hamilton, D. W. and Moor, R. M. (1973), The origin of equine endometrial cups. II. Invasion of the endometrium by trophoblast. Anat. Rec., 177: 485–501. doi: 10.1002/ar.1091770403
- Issue online: 27 JAN 2005
- Version of Record online: 27 JAN 2005
- Manuscript Accepted: 22 JUN 1973
- Manuscript Received: 20 FEB 1973
Light and electron microscopic examination of tissues fixed in situ by perfusion of the gravid horn of the uteri of mares between 36 and 38 days of gestation revealed that the equine endometrial cups are composed of trophoblast cells which originate from the discrete annulate portion of the foetal membranes known as the chorionic girdle. This structure consists of closely opposed villous projections of elongated trophoblast cells and it becomes firmly attached to the endometrium around the thirty-sixth day of pregnancy. The specialized girdle cells invade and phagocytose the endometrial epithelium and then migrate through the basal lamina into the endometrial stroma where they develop into endometrial cup cells.