with a view to investigating the mechanism of the action of estrogen involved in nidation , the biologically active rat uterine rna thereby derived was extracted and then administered in the uterine cavity of castrated rats to observe the ensuing morphological changes in the endometrium and compare them with those resulting from the administration of decidual rna which is non-estrogenised .
C0014180
endometrium
C0011106
decidual