Tissue- and hormone- dependent progesterone receptor distribution in the rat uterus

Table 1 Experiment 1

Experimental Group	Day 1 (8 am) treatment	Day 2 (8 am) treatment	Day 3 (8 am)	Uterine weight (g)
OvxC (n = 5)	vehicle	vehicle	sacrifice	0.092^a ± 0.008
24E (n = 6)	E2	sacrifice		0.162^bcd* ± 0.019
24P (n = 6)	P	sacrifice		0.122^abc ± 0.013
48E (n = 6)	E2	E2	sacrifice	0.215^b* ± 0.039
48P (n = 6)	P	P	sacrifice	0.098^ad ± 0.008
24E+24P (n = 6)	E2	P	sacrifice	0.145^abc ± 0.012
24P+24E (n = 6)	P	E2	sacrifice	0.170^c* ± 0.018

The rats were injected s.c. in the neck with either vehicle (propyleneglycol), 10 μg E₂/kg rat, or 4 mg P₄/kg rat, or combinations of these. Experimental animals were sacrificed after 24 or 48 hours of hormone treatment, respectively. The uterine wet weight is presented in grams (mean ± SD). Numbers (right column) without any common superscript letters indicate a significant (p < 0.05) difference in uterine weight. The asterisk (*) indicates a significant (p < 0.05) difference in uterine weight as compared to OvxC.

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