Granulated metrial gland cells and interstitial trophoblast in the uterinewall of the bank vote, Clethrionomys glareolus, in early pregnancy

The morphology and distribution of granulated metrial gland cells and of in terstitial trophoblast cells in the uterine wall was studied in the first h alf of pregnancy in the bank vole, Clethrionomys glareolus. The morphology and distribution of granulated metrial gland cells was generally similar to that found in other members of the Rodentia, although they were absent fro m the walls of the arterial vessels passing through the decidua basalis. In terstitial trophoblast invaded the decidualising endometrium mesometrial to , and antimesometrial to, the implanted embryos. There was no apparent spat iotemporal relationship between the distribution of granulated metrial glan d cells and interstitial trophoblast cells.