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Human Reproduction, Vol. 14, No. 2, 505-514, February 1999
© 1999 European Society of Human Reproduction and Embryology

Immunohistochemical localization of receptors for progesterone and oestradiol-17ß in the implantation site of the rhesus monkey

Debabrata Ghosh, Surajit Dhara, Arvind Kumar and Jayasree Sengupta1

Department of Physiology, All India Institute of Medical Sciences, New Delhi 110029, India

The aim of the present study was to examine the cellular basis of the involvement of oestradiol and progesterone in blastocyst implantation in the primate. To this end, the cellular distribution of receptors for oestradiol (ER) and progesterone (PR) in fetal trophoblast cells and in endometrial compartments of timed lacunar (pre-villous) and villous stages of placentation in primary implantation sites collected on days 13–22 of gestation were investigated in rhesus monkeys. Both in pre-villous stage tissue and in villous stage tissue, cytotrophoblast cells and syncytiotrophoblast cells and other trophoblast derived cells were PR positive, while they were generally ER negative. Maternal endometrial cells were ER negative, while epithelial cells, stromal cells and vascular endothelial cells in maternal endometrium showed heterogeneous staining patterns for PR depending on their relative location; these patterns, however, correlated well with glandular hyperplasia and differentiation, stromal–decidual transformation and vascular response seen during blastocyst implantation.

Key words: cytotrophoblast /endometrium/oestrogen receptor/progesterone receptor/syncytiotrophoblast

1 To whom correspondence should be addressed


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