In vitro decidualization activity assay of human endometrial stromal cells.

To address the need for a simple and reliable system for evaluating the effects of bioactive substances on decidualization of endometrial stromal cells, we designed and tested an assay for measuring decidualization activity. With our assay, it is easy to examine the effects of various bioactive substances on endometrial stromal decidualization. For example, as shown in this study, it is now clear that neither RANTES nor gonadotropin releasing hormone agonist has any effect on endometrial stromal decidualization. Our simple assay has also made it possible to evaluate individual stromal decidualization activities and the regulation of decidualization.